[confuciuskitty]

Well I just got done taking my Nitro on its first road trip....did pretty good with gas mileage - 25 mpg - One thing however the tire pressure alarm came on when I was in the middle of nowhere. I filled the tires (all of them) and it turned off. Then coming back, it went on again....then when I stopped again, it turned off without putting air in. Did anyone else ever have this happen? I have only had it 2 months. I'm taking it again 300 miles in 2 weeks and I'd like to know is it just sensitive or could there be a short or is the air pressure is just plum that sensitive in the tires....:i_rolleyes: It rides like a dream though, and my Nitro is still my true love...

Kitty

 

[DAYLEY/CHALLENGER]

My rear left is always going off............Nothing ever wrong..........

 

[HER NITRO]

I have also had this problem it was dinging away like i had a flat i pulled over and there was nothing wrong ....i tured off the truck and back on it was there anymore...:i_rolleyes:

 

[minitrucker007]

This is what the manual has to say about the tire pressure system.

WARNING!
Overloading of your tires is dangerous. Overloading
can cause tire failure, affect vehicle handling, and
increase your stopping distance. Use tires of the
recommended load capacity for your vehicle. Never
overload them.
TIRES — GENERAL INFORMATION
Tire Pressure
Proper tire inflation pressure is essential to the safe and
satisfactory operation of your vehicle. Three primary
areas are affected by improper tire pressure:
1. Safety—
WARNING!
² Improperly inflated tires are dangerous and can cause
accidents.
² Under inflation increases tire flexing and can result in
tire failure.
² Over inflation reduces a tire’s ability to cushion shock.
Objects on the road and chuckholes can cause damage that
result in tire failure.
² Unequal tire pressures can cause steering problems. You
could lose control of your vehicle.
² Over inflated or under inflated tires can affect vehicle
handling and can fail suddenly, resulting in loss of vehicle
control.
² Unequal tire pressures from one side of the vehicle to the
other can cause the vehicle to drift to the right or left.
² Always drive with each tire inflated to the recommended
cold tire inflation pressure.
STARTING AND OPERATING 287
5
2. Economy—
Improper inflation pressures can cause uneven wear
patterns to develop across the tire tread. These abnormal
wear patterns will reduce tread life resulting in a need for
earlier tire replacement. Under inflation also increases
tire rolling resistance and results in higher fuel consumption.
3. Ride Comfort and Vehicle Stability—
Proper tire inflation contributes to a comfortable ride.
Over inflation produces a jarring and uncomfortable ride.
Both under inflation and over inflation affect the stability
of the vehicle and can produce a feeling of sluggish
response or over responsiveness in the steering.
Unequal tire pressures can cause erratic and unpredictable
steering response.
Unequal tire pressure from side to side may cause the
vehicle to drift left or right.
Tire Inflation Pressures
The proper cold tire inflation pressure is listed on either
the face of the driver’s door or the driver’s side “B” pillar.
The pressure should be checked and adjusted as well as
inspecting for signs of tire wear or visible damage at least
once a month. Use a good quality pocket-type gauge to
Tire Placard Location
288 STARTING AND OPERATING
check tire pressure. Do not make a visual judgement
when determining proper inflation. Radial tires may look
properly inflated even when they are under inflated.
CAUTION!
After inspecting or adjusting the tire pressure, always
reinstall the valve stem cap (if equipped). This
will prevent moisture and dirt from entering the
valve stem, which could damage the valve stem.
Inflation pressures specified on the placard are always
“cold tire inflation pressure.” Cold tire inflation pressure
is defined as the tire pressure after the vehicle has not
been driven for at least 3 hours, or driven less than 1 mile
(1 km) after a 3 hour period. The cold tire inflation
pressure must not exceed the maximum inflation pressure
molded into the tire sidewall.
Check tire pressures more often if subject to a wide range
of outdoor temperatures, as tire pressures vary with
temperature changes.
Tire pressures change by approximately 1 psi (7 kPa) per
12° F (7° C) of air temperature change. Keep this in mind
when checking tire pressure inside a garage, especially in
the winter.
Example: If garage temperature = 68° F (20° C) and the
outside temperature = 32° F (0° C) then the cold tire
inflation pressure should be increased by 3 psi (21 kPa),
which equals 1 psi (7 kPa) for every 12° F (7° C) for this
outside temperature condition.
Tire pressure may increase from 2 to 6 psi (13 to 40 kPa)
during operation. DO NOT reduce this normal pressure
build up or your tire pressure will be too low.
STARTING AND OPERATING 289
5
Tire Pressures for High Speed Operation
The manufacturer advocates driving at safe speeds
within posted speed limits. Where speed limits or conditions
are such that the vehicle can be driven at high
speeds, maintaining correct tire inflation pressure is very
important. Increased tire pressure and reduced vehicle
loading may be required for high-speed vehicle operation.
Refer to original equipment or an authorized tire
dealer for recommended safe operating speeds, loading
and cold tire inflation pressures.
WARNING!
High speed driving with your vehicle at or above
maximum load is dangerous. The added strain on
your tires could cause them to fail. You could have a
serious accident. Don’t drive a vehicle loaded to the
maximum capacity at continuous speeds above 75
mph (120 km/h).
Radial-Ply Tires
WARNING!
Combining radial ply tires with other types of tires
on your vehicle will cause your vehicle to handle
poorly. The instability could cause an accident. Always
use radial tires in sets of four. Never combine
them with other types of tires.
Cuts and punctures in radial tires are repairable only in
the tread area because of sidewall flexing. Consult your
dealer for radial tire repairs.
Tire Spinning
When stuck in mud, sand, snow, or ice conditions, do not
spin your vehicle’s wheels above 35 mph (55 km/h).
290 STARTING AND OPERATING
WARNING!
Fast spinning tires can be dangerous. Forces generated
by excessive wheel speeds may cause tire damage
or failure. A tire could explode and injure someone.
Do not spin your vehicle’s wheels faster than 35
mph (55 km/h) when you are stuck, and do not let
anyone near a spinning wheel no matter what the
speed.
Tread Wear Indicators
Tread wear indicators are in the original equipment tires
to help you in determining when your tires should be
replaced.
These indicators are molded into the bottom of the tread
grooves. They will appear as bands when the tread depth
becomes 1/16 inch (2 mm). When the indicators appear
in 2 or more adjacent grooves, the tire should be replaced.
Many states have laws requiring tire replacement at this
point.
STARTING AND OPERATING 291
5
Life of Tire
The service life of a tire is dependent upon varying
factors including but not limited to:
² Driving style
² Tire pressure
² Distance driven
WARNING!
Tires and spare tire should be replaced after six years,
regardless of the remaining tread. Failure to follow
this warning can result in sudden tire failure. You
could lose control and have an accident resulting in
serious injury or death.
Keep dismounted tires in a cool, dry place with as little
exposure to light as possible. Protect tires from contact
with oil, grease, and gasoline.
Replacement Tires
The tires on your new vehicle provide a balance of many
characteristics. They should be inspected regularly for
wear and correct cold tire inflation pressure. The manufacturer
strongly recommends that you use tires equivalent
to the originals in size, quality and performance
when replacement is needed (refer to the paragraph on
“Tread Wear Indicators”). Refer to the “Tire and Loading
Information” placard for the size designation of your tire.
The service description and load identification will be
found on the original equipment tire. Failure to use
equivalent replacement tires may adversely affect the
safety, handling, and ride of your vehicle.We recommend
that you contact your original equipment or an authorized
tire dealer with any questions you may have on tire
specifications or capability.
292 STARTING AND OPERATING
WARNING!
² Do not use a tire, wheel size or rating other than that
specified for your vehicle. Some combinations of
unapproved tires and wheels may change suspension
dimensions and performance characteristics, resulting
in changes to steering, handling, and braking of
your vehicle. This can cause unpredictable handling
and stress to steering and suspension components.
You could lose control and have an accident resulting
in serious injury or death. Use only the tire and wheel
sizes with load ratings approved for your vehicle.
² Never use a tire with a smaller load index or capacity,
other than what was originally equipped on your
vehicle. Using a tire with a smaller load index could
result in tire overloading and failure. You could lose
control and have an accident.
² Failure to equip your vehicle with tires having adequate
speed capability can result in sudden tire
failure and loss of vehicle control.
CAUTION!
Replacing original tires with tires of a different size
may result in false speedometer and odometer
readings.
Alignment and Balance
Poor suspension alignment may result in:
² Fast tire wear.
² Uneven tire wear, such as feathering and one-sided
wear.
² Vehicle pull to right or left.
Tires may also cause the vehicle to pull left or right.
Alignment will not correct this problem. See your authorized
dealer for proper diagnosis.
STARTING AND OPERATING 293
5
Improper alignment will not cause vehicle vibration.
Vibration may be a result of tire and wheel out-ofbalance.
Proper balancing will reduce vibration and
avoid tire cupping and spotty wear.
TIRE CHAINS
Use “Class S” chains or other traction aids that meet SAE
Type “S” specifications.
NOTE: Chains must be the proper size for the vehicle,
as recommended by the chain manufacturer.
CAUTION!
To avoid damage to your vehicle, tires or chains, observe the
following precautions:
² Because of limited chain clearance between tires and other
suspension components, it is important that only chains in
good condition are used. Broken chains can cause serious
vehicle damage. Stop the vehicle immediately if noise occurs
that could suggest chain breakage. Remove the damaged
parts of the chain before further use.
² Install chains as tightly as possible and then retighten after
driving about 1/2 mile (0.8 km).
² Do not exceed 45 mph (72 km/h).
² Drive cautiously and avoid severe turns and large bumps,
especially with a loaded vehicle.
² Do not drive for a prolonged period on dry pavement.
² Observe the tire chain manufacturer’s instructions on
method of installation, operating speed, and conditions for
usage. Always use the lower suggested operating speed of
the chain manufacturer if different than the speed recommended
by the manufacturer.
294 STARTING AND OPERATING
These cautions apply to all chain traction devices, including
link and cable (radial) chains.
Tire chain use is permitted only on the rear tires.
NOTE: The use of class “S” chains is permitted with
P235/65R17 tires.

 

[minitrucker007]

CAUTION!
Do not use tire chains on vehicles equipped with
tires other than P235/65R17 tires. There may not be
adequate clearance for the chains and you are risking
structural or body damage to your vehicle.
TIRE ROTATION RECOMMENDATIONS
Tires on the front and rear axles of vehicles operate at
different loads and perform different steering, handling,
and braking functions. For these reasons, they wear at
unequal rates, and develop irregular wear patterns.
These effects can be reduced by timely rotation of tires.
The benefits of rotation are especially worthwhile with
aggressive tread designs such as those on On/Off Road
type tires. Rotation will increase tread life, help to maintain
mud, snow, and wet traction levels, and contribute to
a smooth, quiet ride.
Follow the recommended tire rotation frequency for your
type of driving found in the “Maintenance Schedules”
Section of this manual. More frequent rotation is permissible
if desired. The reasons for any rapid or unusual
wear should be corrected prior to rotation being performed.
STARTING AND OPERATING 295
5
NOTE: The Premium Tire Pressure Monitor System will
automatically locate the pressure values displayed in the
correct vehicle position following a tire rotation.
The suggested rotation method is the “forward-cross”
shown in the following diagram.
TIRE PRESSURE MONITOR SYSTEM (TPMS) — IF
EQUIPPED
² The Tire Pressure Monitor System (TPMS) will warn
the driver of a low tire pressure based on the vehicle
recommended cold placard pressure.
² The tire pressure will vary with temperature by about
1 psi (6.9 kPa) for every 12°F (6.5°C). This means that
when the outside temperature decreases, the tire pressure
will decrease. Tire pressure should always be set
based on cold inflation tire pressure. This is defined as
the tire pressure after the vehicle has not been driven
for at least 3 hours, or driven less than 1 mile (1 km)
after a 3 hour period. The cold tire inflation pressure
must not exceed the maximum inflation pressure
molded into the tire sidewall. Refer to the “Tires –
General Information” in this section for information
on how to properly inflate the vehicle’s tires. The tire
296 STARTING AND OPERATING
pressure will also increase as the vehicle is driven - this
is normal and there should be no adjustment for this
increased pressure.
² The TPM System will warn the driver of a low tire
pressure if the tire pressure falls below the lowpressure
warning limit for any reason, including low
temperature effects and natural pressure loss through
the tire.
² The TPM System will continue to warn the driver of
low tire pressure as long as the condition exists, and
will not turn off until the tire pressure is at or above
the recommended cold placard pressure. Once the low
tire pressure warning (Tire Pressure Monitoring Telltale
Light) illuminates, you must increase the tire
pressure to the recommended cold placard pressure in
order for the Tire Pressure Monitoring Telltale Light to
turn off. The system will automatically update and the
Tire Pressure Monitoring Telltale Light will turn off
once the system receives the updated tire pressures.
The vehicle may need to be driven for up to 10 minutes
above 15 mph (25 km/h) in order for the TPMS to
receive this information.
− For example, your vehicle may have a recommended
cold (parked for more than 3 hours) placard
pressure of 33 psi (227 kPa). If the ambient temperature
is 68°F (20°C) and the measured tire pressure is
28 psi (193 kPa), a temperature drop to 20°F (-7°C)
will decrease the tire pressure to approximately 24
psi (165 kPa). This tire pressure is sufficiently low
enough to turn ON the Tire Pressure Monitoring
Telltale light. Driving the vehicle may cause the tire
pressure to rise to approximately 28 psi (193 kPa),
but the Tire Pressure Monitoring Telltale Light will
still be ON. In this situation, the Tire Pressure
Monitoring Telltale Light will turn OFF only after
the tires are inflated to the vehicle’s recommended
cold placard pressure value.
STARTING AND OPERATING 297
5
CAUTION!
² The TPMS has been optimized for the original
equipment tires and wheels. TPMS pressures and
warning have been established for the tire size
equipped on your vehicle. Undesirable system
operation or sensor damage may result when using
replacement equipment that is not of the same
size, type, and/or style. Aftermarket wheels can
cause sensor damage. Do not use aftermarket tire
sealants or balance beads if your vehicle is
equipped with a TPMS, as damage to the sensors
may result.
² After inspecting or adjusting the tire pressure,
always reinstall the valve stem cap. This will
prevent moisture and dirt from entering the valve
stem, which could damage the Tire Pressure Monitoring
Sensor.
NOTE:
² The TPMS is not intended to replace normal tire care
and maintenance, or to provide warning of a tire
failure or condition.
² The TPMS should not be used as a tire pressure gauge
while adjusting your tire pressure.
² Driving on a significantly under-inflated tire causes
the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel efficiency and tire
tread life, and may affect the vehicle’s handling and
stopping ability.
² The TPMS is not a substitute for proper tire maintenance,
and it is the driver’s responsibility to maintain
correct tire pressure using an accurate tire pressure
gauge, even if under-inflation has not reached the
level to trigger illumination of the Tire Pressure Monitoring
Telltale light.
298 STARTING AND OPERATING
² Seasonal temperature changes will affect tire pressure,
and the TPMS will monitor the actual tire pressure in
the tire.
Base System — If Equipped
The Tire Pressure Monitor System (TPMS) uses wireless
technology with wheel rim mounted electronic sensors to
monitor tire pressure levels. Sensors, mounted to each
wheel as part of the valve stem, transmit tire pressure
readings to the Receiver Module.
NOTE: It is particularly important for you to check the
tire pressure in all of the tires on your vehicle monthly
and to maintain the proper pressure.
The TPMS consists of the following components:
² Receiver Module
² 4 Tire Pressure Monitoring Sensors
² Tire Pressure Monitoring Telltale Light
The matching full size spare wheel and tire assembly (if
equipped) has a tire pressure monitoring sensor. The
matching full size spare can be used in place of any of the
four road tires. The TPMS will only monitor the pressure
in the full size spare when it is used in place of a road tire.
Otherwise, a spare with a pressure below the lowpressure
limit will not cause the Tire Pressure Monitoring
Telltale Light to illuminate or the chime to sound.
Tire Pressure Monitoring Low Pressure Warnings
The Tire Pressure Monitoring Telltale Light will
illuminate in the instrument cluster and a chime
will sound when tire pressure is low in one or
more of the four active road tires. Should this occur, you
should stop as soon as possible, check the inflation
pressure of each tire on your vehicle, and inflate each tire
to the vehicle’s recommended cold placard pressure
value. Once the system receives the updated tire pressures,
the system will automatically update and the Tire
Pressure Monitoring Telltale Light will turn off. The
STARTING AND OPERATING 299
5
vehicle may need to be driven for up to 10 minutes above
15 mph (25 km/h) in order for the TPMS to receive this
information.
Check TPMS Warning
When a system fault is detected, the Tire Pressure Monitoring
Telltale Light will flash on and off for 75 seconds
and then remain on solid. The system fault will also
sound a chime. If the ignition key is cycled, this sequence
will repeat, providing the system fault still exists. The
Tire Pressure Monitoring Telltale Light will turn off when
the fault condition no longer exists. A system fault can
occur due to any of the following:
1. Jamming due to electronic devices or driving next to
facilities emitting the same Radio Frequencies as the TPM
sensors.
2. Installing some form of aftermarket window tinting
that affects radio wave signals.
3. Lots of snow or ice around the wheels or wheel
housings.
4. Using tire chains on the vehicle.
5. Using wheels/tires not equipped with TPM sensors.
NOTE:
Vehicles with Full Size Spare
1. The matching full size spare wheel and tire assembly
has a tire pressure monitoring sensor that can be monitored
by the TPMS.
2. If you install the full size spare in place of a road tire
that has a pressure below the low-pressure warning limit,
upon the next ignition key cycle, a chime will sound and
the TPM Telltale Light will turn ON.
3. Driving the vehicle for up to 10 minutes above 15 mph
(25 km/h) will turn off the TPM Telltale Light, as long as
no tire pressure is below the low-pressure warning limit
in any of the four active road tires.
300 STARTING AND OPERATING
NOTE:
Vehicles with Compact Spare
1. The compact spare tire does not have a tire pressure
monitoring sensor. Therefore, the TPMS will not monitor
the pressure in the compact spare tire.
2. If you install the compact spare tire in place of a road
tire that has a pressure below the low-pressure warning
limit, upon the next ignition key cycle, a chime will
sound and the TPM Telltale Light will turn ON.
3. After driving the vehicle for up to 10 minutes above 15
mph (25 km/h), the TPM Telltale Light will flash on and
off for 75 seconds and then remain on solid.
4. For each subsequent ignition key cycle, a chime will
sound and the TPM Telltale Light will flash on and off for
75 seconds and then remain on solid.
5. Once you repair or replace the original road tire, and
reinstall it on the vehicle in place of the compact spare,
the TPMS will update automatically and the TPM Telltale
Light will turn OFF, as long as no tire pressure is below
the low-pressure warning limit in any of the four active
road tires. The vehicle may need to be driven for up to 10
minutes above 15 mph (25 km/h) in order for the TPMS
to receive this information.
Premium System — If Equipped
The Tire Pressure Monitor System (TPMS) uses wireless
technology with wheel rim mounted electronic sensors to
monitor tire pressure levels. Sensors, mounted to each
wheel as part of the valve stem, transmit tire pressure
readings to the Receiver Module.
NOTE: It is particularly important for you to check the
tire pressure in all of the tires on your vehicle monthly
and to maintain the proper pressure.
The TPMS consists of the following components:
² Receiver Module
² 4 Tire Pressure Monitoring Sensors
STARTING AND OPERATING 301
5
² 3 Trigger Modules (mounted in three of the four
wheel-wells)
² Various Tire Pressure Monitoring System Messages,
which display in the Electronic Vehicle Information
Center (EVIC)
² Tire Pressure Monitoring Telltale Light
The matching full size spare wheel and tire assembly (if
equipped) has a tire pressure monitoring sensor. The full
size spare can be used in place of any of the four road
tires. A spare with a pressure below the low-pressure
limit will not cause the Tire Pressure Monitoring Telltale
Light to illuminate or the chime to sound. However, it
will cause a “SPARE LOW PRESSURE” message to
display in the EVIC.
Tire Pressure Monitoring Low Pressure Warnings
The Tire Pressure Monitoring Telltale Light will
illuminate in the instrument cluster and a chime
will sound when tire pressure is low in one or more of the
four active road tires. In addition, the Electronic Vehicle
Information Center (EVIC) will display a graphic showing
the pressure values of each tire with the low tire
pressure values flashing.
Should this occur, you should stop as soon as possible,
and inflate the tires with low pressure (those flashing in
302 STARTING AND OPERATING
the EVIC graphic) to the vehicle’s recommended cold
placard pressure value. Once the system receives the
updated tire pressures, the system will automatically
update, the graphic display in the EVIC will stop flashing,
and the Tire Pressure Monitoring Telltale Light will
turn off. The vehicle may need to be driven for up to 10
minutes above 15 mph (25 km/h) in order for the TPMS
to receive this information.
Check TPMS Warning
When a system fault is detected, the Tire Pressure Monitoring
Telltale Light will flash on and off for 75 seconds
and then remain on solid. The system fault will also
sound a chime. In addition, the EVIC will display a
9CHECK TPM SYSTEM9 message for 3 seconds and then
display dashes (- -) in place of the pressure value to
indicate which sensor is not being received.
If the ignition key is cycled, this sequence will repeat,
providing the system fault still exists. If the system fault
no longer exists, the Tire Pressure Monitoring Telltale
Light will no longer flash, and the 9CHECK TPM SYSTEM9
message will no longer display, and a pressure
value will display in place of the dashes. A system fault
can occur due to any of the following:

 

[minitrucker007]

STARTING AND OPERATING 303
5
1. Jamming due to electronic devices or driving next to
facilities emitting the same Radio Frequencies as the TPM
sensors.
2. Installing some form of aftermarket window tinting
that affects radio wave signals.
3. Lots of snow or ice around the wheels or wheel
housings.
4. Using tire chains on the vehicle.
5. Using wheels/tires not equipped with TPM sensors.
NOTE:
Vehicles with Full Size Spare
1. The matching full size spare wheel and tire assembly
has a tire pressure monitoring sensor that can be monitored
by the TPMS.
2. If you install the full size spare in place of a road tire
that has a pressure below the low-pressure warning limit,
upon the next ignition key cycle, a chime will sound and
the TPM Telltale Light will turn ON. In addition, the
EVIC will display a Low Pressure message and a graphic
showing the low tire pressure value flashing.
3. After driving the vehicle for up to 10 minutes above 15
mph (25 km/h) the TPM Telltale Light will turn OFF, as
long as no tire pressure is below the low-pressure warning
limit in any of the four active road tires.
4. The EVIC will display a graphic showing the tire
pressure value in place of the flashing low tire pressure
value. The EVIC will also display a “SPARE LOW
PRESSURE” message to remind you to service the flat
tire.
NOTE:
Vehicles with Compact Spare
1. The compact spare tire does not have a tire pressure
monitoring sensor. Therefore, the TPMS will not monitor
the pressure in the compact spare tire.
304 STARTING AND OPERATING
2. If you install the compact spare tire in place of a road
tire that has a pressure below the low-pressure warning
limit, upon the next ignition key cycle, the TPM Telltale
Light will remain ON and a chime will sound. In
addition, the graphic in the EVIC will still display a
flashing pressure value.
3. After driving the vehicle for up to 10 minutes above 15
mph (25 km/h), the TPM Telltale Light will flash on and
off for 75 seconds and then remain on solid. In addition,
the EVIC will display a 9CHECK TPM SYSTEM9 message
for 3 seconds and then display dashes (- -) in place of the
pressure value.
4. For each subsequent ignition key cycle, a chime will
sound, the TPM Telltale Light will flash on and off for 75
seconds and then remain on solid, and the EVIC will
display a 9CHECK TPM SYSTEM9 message for 3 seconds
and then display dashes (- -) in place of the pressure
value.
5. Once you repair or replace the original road tire, and
reinstall it on the vehicle in place of the compact spare,
the TPMS will update automatically. In addition, the
TPM Telltale Light will turn OFF and the graphic in the
EVIC will display a new pressure value instead of dashes
(- -), as long as no tire pressure is below the low-pressure
warning limit in any of the four active road tires. The
vehicle may need to be driven for up to 10 minutes above
15 mph (25 km/h) in order for the TPMS to receive this
information.
General Information
This device complies with part 15 of the FCC rules and
RSS 210 of Industry Canada. Operation is subject to the
following conditions:
² This device may not cause harmful interference.
² This device must accept any interference received,
including interference that may cause undesired operation.

 

[Scar0]

You could have a bad sensor in the tire. Or the receiver module could be faulty. Take it to your dealer and have it checked.
Also over-inflation can cause a warning as well. On hot days your tire pressure could increase while driving and cause a warning.

 

[confuciuskitty]

wow, thanks for all the info here! Yes it was a hot day....I guess I'll have to buy a pressure gauge. One question....is the proper psi 34? I have 16 inch aluminum wheels....is it on the side of the tires? Thanks again...and btw the light dinged for about a minute then stayed on steady. Perhaps there is a clue in there...
Kitty

 

[DogLHunt]

Look on the inside of your driver door jam. There should be a sticker that tells you what your air pressure should be for the front and back tires.

 

[TylerCanada]

I certainly hope people who have the chime and say nothing is wrong have actually checked the tire pressure with a gauge and not just looked at them. You can't tell when tires are low just by looking at them.

Also, the only pressure ever listed ON the tire is the maximum, which would probably be around 50 PSI. If normal is 33 PSI (or whatever it is), 50 would be VERY rough.

 

[nitro4x4]

I had this problem one evening with my front left tire. When I had restarted my nitro after my next stop the warning light came on for a second and then went off. The following day I was bringing it in for its 25000 km service. They said they could do nothing because the warning light was not on. It has not happened since.

 

[squig29]

I had my tpm ding quite alot last winter & my pressure was fine. I parked in my warm garage & then went out into the cold & DING. I went to the dealer & had them adjust the tolerance so it wouldn't happen anymore. Unfortunately I didn't explain that I still wanted use of the tpm & the tech lowered the sensitivity to 15 psi (how nice of him to basically render this feature useless to me). They told me the tolerance is normally only a couple of psi. The heat from driving is enough to raise your psi a few degrees (how much depends on road temp) & in some cases this can set off the tpm. When you stop the pressure will fall. It's ridiculous to think the typical driver is going to continually check their pressures every day, so to have the tolerance so low is quite dumb.
So in my opinion, go to your dealer & tell them to lower the sensitivity around 3psi & you shouldn't have anymore problems. :Racing:

 

[Scar0]

:iagree:Good post. squig29

 

[mdwcalif]

Yes, Kitty! Get a pressure gauge! Can't hurt to have a measurement to give you another way to tell. OK and I confess, I HATE dealing with tire pressure. I have manual and electronic gauges that I carry at all times, but I still worry about it, because I'm always afraid I'm going to let out too much air by applying the gauge, and if I do that and am not by an air pump ... etc etc. It's just an irrational fear thing I have.

I made the mistake (discussed on another thread somewhere) of taking some guy's advice to inflate my tires to the "max" pressure shown on the tires themselves (versus the door jamb sticker), and got warned by the folks here that it was over-inflation, so I fixed it before I had driven too many miles over-inflated. It was a guy at a car shop, and I assumed (doh!) that he knew what he was talking about. WRONG. The gang here knows their stuff!

 

[Kell]

This is the same problem that I have with Norm. We got him all new tires before winter and everything was fine. (We had experienced the flat tire / spare with no sensor in it / -- TPM System error. The new tires fixed that. Then for no reason, the error started again indicating -- for the rear passenger side tire. It is quite annoying in that DH regularly checks the tire pressure (with a gauge) and the pressure is fine. Is there any way this can be disabled? It's very annoying when you do a lot of night driving as it brightens up the instrument cluster a bunch and bothers my poor old eyes a bunch. We will probably have it checked when we take Norm in for his wiper recall, but would be nice to know if there was something else to do ... even a temp fix. It must a sensor on that tire according to what I have read here.:4-dontknow:

I sure hear ya on tire over-inflation. After one of the oil changes, the guys at the shop, unasked, aired up Norm's tires to 45-47 PSI. I like him to have around 33 PSI. That was just dumb on their part! Sorry to be so windy here, but you know how it goes.

 

[CuriousG]

Could be a faulty sensor/transmitter, but don't forget to check your spare as well.

Last year mine started to go every once in a while, usually when I started it cold, but after driving for a while, it would turn off again. Turns out I had a nail in the tire....wouldn't have known otherwise. I was lazy and drove it that way for a few months....and I used the warning as my indicator to add more air.

And yes, a good pressure guage is a must have for sure. I like the digital ones because you don't have to guess what it says

 

[Kell]

Thanks for the advice, CuriousG. I probably would have spaced out the spare. :shy:

 

[IfixitBR]

TPM Sensor Problems

I have a 2007 R/T with 89,000 miles and have endured TPM problems since it was new. The factory programs in a "normal" tire pressure. (Changeable by your dealer if you ask them to) If the tire pressure of any one tire goes 5psi above or below that point, the system reports it. If you actually have a low tire, it will say Check TPM and the individual indicator for each tire will indicate which tire.
The "problem" report that I am experiencing is when you look at the individual tire pressures, one of the tires wil report "--". The diagnostic code for this indicates that the TPM transmitter in the valve stem assembly is missing. This WILL occur if you put the spare on, since it has no transmitter. If the problem is actually onme of the transmitters, simply rotating the tires should make the problem move with the tire.
In my case, this makes no difference. It's always one of the rear wheels reporting the problem, left side twice as often as the right.
The dealer replaced the receiver for the left side with no results. The problem appears to be poor reception of the signal from the wheel, or interference. It goes away by itself the next time the system re-reads the device. Turning the ignition off and re-starting causes ALL sensors to update, thereby seeming to temporarily fix the problem. I also have a similiar problem with my stability control disabling itself. That one is due to a steering position sensor not always reporting properly.
When the weather gets warmer, I'll look into the location of the rear TPM receivers and see if they can be re-located to improve reliability.
Hope this info helps,
IfixitBR

 

[Miss Daisy]

:smileup: Thanks, this kind of info is always appreciated.

I have a 2007 R/T with 89,000 miles and have endured TPM problems since it was new. The factory programs in a "normal" tire pressure. (Changeable by your dealer if you ask them to) If the tire pressure of any one tire goes 5psi above or below that point, the system reports it. If you actually have a low tire, it will say Check TPM and the individual indicator for each tire will indicate which tire.
The "problem" report that I am experiencing is when you look at the individual tire pressures, one of the tires wil report "--". The diagnostic code for this indicates that the TPM transmitter in the valve stem assembly is missing. This WILL occur if you put the spare on, since it has no transmitter. If the problem is actually onme of the transmitters, simply rotating the tires should make the problem move with the tire.
In my case, this makes no difference. It's always one of the rear wheels reporting the problem, left side twice as often as the right.
The dealer replaced the receiver for the left side with no results. The problem appears to be poor reception of the signal from the wheel, or interference. It goes away by itself the next time the system re-reads the device. Turning the ignition off and re-starting causes ALL sensors to update, thereby seeming to temporarily fix the problem. I also have a similiar problem with my stability control disabling itself. That one is due to a steering position sensor not always reporting properly.
When the weather gets warmer, I'll look into the location of the rear TPM receivers and see if they can be re-located to improve reliability.
Hope this info helps,
IfixitBR

 

[Scar0]

Most Nitros come with a TPM in the spare. It "goes to sleep" because it is inactive. Thus conserving the battery.
When the spare is put on the Nitro, it takes about 10 minutes of constant driving over 25 mph for the system to recognize that it is now active. Then the dash light will go off. All 5 sensor codes have to be programmed into the system for them to work correctly. For a full break down see this thread.
Tire Pressure Monitoring System
Also see this thread. TSB 22-001-06 REV. B Tire Pressure Monitoring System (TPM) Displays Dashes "--" When The Spare Tire