Skip the auto shop - Our mechanics make house calls

Q: Tire Pressure Mgmt System light on - how to keep it off? Ford

asked by on

the tmps light on my truck keeps coming on usually after it got cold . . . tire never looks low, and i can drive months with light on, but not lose anymore air from the tire . . it takes constant servicing to keep the tires over 35 lbs to turn the light off. why is this? is the sensor bad? or the computer on the truck malfunctioning?

My car has 40000 miles.
My car has an automatic transmission.

Hello - most likely this is not a malfunction of the TPMS sensors or any other vehicle system. This is caused by the drops in temperature - which decreases the pressure in the tires; just as tire pressures increase while driving. Tire pressure can decrease enough to trigger the TPMS sensors during a change in season, or after a cold front rolls through. This is by design, in order to prevent excessive tire wear at the edges of the tire due to underinflation. The only solution, and the desired solution, is to add air to tires as temperatures drop, and let air out in the spring when temperatures rise. If tire pressures are all at the specified temperature, have the TPMS system examined by a reputable tire dealer in your area. The tires must be removed for this check. Unfortunately, this is not a service YourMechanic can offer. Thanks for thinking of us!

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Tire pressure system malfunctioning.

The tire pressure monitoring system may need to be placed in a relearn mode in order to relearn the tire pressure from each of the tires. As the relearn procedure is being completed the car signals as it reads from...

Q: TPMS light coming on while driving

The tire pressure sensors continuously broadcast their signal to the TPMS control unit. More than likely, one of the tire pressure sensors has failed. Unlike some TPMS systems, the system on your Acura should reset automatically after being driven. If...

Q: TPMS light is on. What does that mean?

Hi there. The TPMS light can come on for several reasons. Most of the time it comes on for low tire pressure. You need to check the tire pressure and make sure that all four, including the spare are filled...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...