Skip the auto shop - Our mechanics make house calls

Q: My car's tire pressure monitoring system lights come on when the tire pressure is normal

asked by on

On occasion, my esc light has gone on in the last few years, but would soon go off. All of a sudden I have all sorts of issues.

Recently, the tpms showed pressure issues with the front driver's side tire. My husband checked and added a little air, even though his gauge didn't show a need. That light went off, and now it is showing 2 other tires are low.

In addition, my heater keeps turning on by itself even after I turn it off. Any help with resolving these issues would be great!

My car has 101000 miles.
My car has an automatic transmission.

A: Your car is equipped with wheel speed senso...

Your car is equipped with wheel speed sensors on each of the four wheels which monitor wheel speed while relaying this information to the ABS and traction control system (ESC) which are controlled by the car’s ECU. When the ECU senses an abnormal speed given specific conditions, it engages the ABS or traction control as needed to control the vehicle. Occasionally, these sensors can fail or only work intermittently, sending inaccurate signals to the ECU. When this happens, you may experience the symptoms you have described. The ABS or traction control system may be inadvertently activated by these false or inaccurate signals.

Your TPMS system works the same way in that there are sensors that monitor the tire pressure relaying this to the car’s computer. These sensors are known to go bad occasionally. Keep in mind this can also fluctuate easily with changes in air temperature, as this changes the density of the air which will affect the way these sensors read tire pressure. With regard to your heater turning off and on, this may be related to the blower motor relay which is what directs power to the heater blower motor. When this is faulty, this may cause the blower fan to work intermittently or sometimes not at all. I would suggest having a professional, such as one from YourMechanic, diagnose your ABS and traction control system to determine the cause of this.

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: My car's ABS light came on and now the transmission won't shift out of first gear

As you know, your vehicle is equipped with wheel speed sensors at each of the four wheels which monitor wheel speed while relaying this information constantly to the ABS and traction control system which are controlled by the car's ECU....

Q: Need to find the location on the vehicle of TPMS ECU

Hello, and thank you for writing in. There is likely another fuse box on the inside of the cabin at the passenger floorboard. Check there first. Then you can check next to the fuses below the steering column buy the...

Q: My EPS, Battery, and Oil Indicator Lights suddenly came on while driving, and my car has stopped moving. My steering also feels heavy

Hyundai has a recall on some model Hyundai cars with this issues (Recall # 14V325000). You don't mention which model you own, but the symptoms you describe match. This recall addresses a wiring harness issue which causes electrical steering assist...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...