Why is the TPMS light not always 100% accurate?
When a tire loses air pressure, the slower speed of the tire rotation is detected by the speed sensors of the Indirect TPMS. This causes the central computer to activate the TPMS light on the dashboard. Unfortunately, the TPMS is not always 100% accurate.
What does the TPMS warning light on my car mean?
TPMS Warning Light Illuminates The ECU or PCM, which receives all the sensors’ information, triggers a warning on your dashboard indicating that something is wrong with the sensors. If a sensor, such as a tire pressure sensor, is not operating by the standard, the ECU illuminates the TPMS light.
How can I tell if my TPMS sensor has gone bad?
The easiest way to find out which TPMS sensor has gone bad is to read the trouble codes with an OBD2 Scanner. If your car has a display of each wheel’s tire pressure on the dashboard, you can also check there if some pressure is irrelevant.
How does a tire pressure sensor ( TPMS ) work?
Tire Pressure Sensor (TPMS) Symptoms, Function & Location. The tire pressure measures the pressure in your car’s tires. It sends over the information to the car’s onboard computer, which analyzes the information and makes proper adjustments.
What does it mean when your TPMS warning light is on?
So check your tires carefully. If your vehicle has a TPMS, it’s probably monitoring the pressure in your spare tire. Therefore, if you get a low tire pressure warning light, and if you’ve checked all four tires that are touching the ground, than you might need to put some air in the spare.
What should the tire pressure be on a TPMS sensor?
If the pressure value displayed on your TPMS tool from a sensor reads 32 psi, you should find 32 psi when you check the pressure with a gauge. A key point here is that your tire pressure gauge must be accurately calibrated. Those cheap spring-loaded stick-style tire pressure gauges often vary up to 5 psi or more.
Why is my tire pressure sensor warning light on?
Disturbed or Tripped Sensor. If you’ve recently had your vehicle serviced and the tire warning light activated immediately or shortly after, it’s likely that something tripped one or more of the tire pressure sensors. Some models require the TPMS to be reset after adding pressure.
What’s the average life of a TPMS sensor?
The valve stem on each wheel should be visually inspected for corrosion or other damage that might affect the integrity of the valve stem. Consider the age and mileage of the vehicle when doing your diagnosis. The average life of the battery inside a brand-new factory TPMS sensor is around seven to 10 years, depending on use.