The message on your dashboard indicates a Tire Pressure Monitoring System (TPMS) issue. It could mean one or more tires are underinflated, or there is a fault with the TPMS itself. Addressing it promptly helps ensure safe handling and fuel efficiency.
Understanding TPMS and the warning
TPMS is designed to alert you when tire pressure falls outside the recommended range or when the monitoring system detects a problem. There are two main types: direct TPMS, which uses sensors inside each tire to gauge pressure, and indirect TPMS, which infers underinflation from wheel speed data and ABS signals. The “Check TPMS system” message can be triggered by low tire pressure or by a fault in the sensors, wiring, battery life, or control module.
Common causes of a TPMS warning include the following:
- Low tire pressure in one or more tires
- Underinflation caused by temperature changes or late-night inflation loss
- Faulty or dead TPMS sensors in the wheels
- Missing or damaged sensor batteries in direct TPMS
- Wiring damage, blown fuses, or a failed TPMS control module
- Vehicle tire rotation or replacement that didn’t trigger a relearn
- Tire repairs that affected the TPMS readings
Even if the tires look properly inflated, a TPMS fault can trigger the alert. If the warning persists after inflating to spec, it’s a signal to have the system checked.
What to do when the warning appears
Follow these practical steps to determine whether you simply need to inflate tires or if there is a deeper TPMS fault. Procedures can vary by vehicle, so consult the owner’s manual for model-specific instructions.
- Check all four tires with a tire pressure gauge and inflate to the vehicle’s recommended pressure (the placard on the door jamb or in the owner’s manual, not the tire’s maximum pressure).
- After inflating, drive a short distance to see if the message clears, since some TPMS systems relearn automatically after reaching the target pressures.
- Inspect tires for obvious damage, punctures, or slow leaks; repair or replace as needed.
- If you’ve recently changed tires, tires were rotated, or you did a reset, follow the manufacturer’s relearn procedure to reprogram the TPMS.
- If the warning remains after ensuring proper inflation and a relearn, have the TPMS scanned with a diagnostic tool to check sensors, battery life, wiring, fuses, and the control module. A professional may need to replace faulty sensors or perform a system reset.
Bottom line: proper tire pressure is essential, and a TPMS fault should be checked promptly to avoid driving with an unrecognized underinflation risk or a failed monitoring system.
Direct TPMS vs. Indirect TPMS
Direct TPMS
Direct TPMS uses sensors embedded in each wheel to measure actual air pressure and transmit readings to the vehicle. These systems can alert you precisely which tire is low, and the sensors may require battery replacement every several years. Damaged or leaking sensors can trigger a TPMS fault even if pressures are normal.
Indirect TPMS
Indirect TPMS does not measure pressure directly. Instead, it compares wheel speed and rotation patterns to detect anomalies that suggest underinflation. Indirect systems rely on correct ABS/ESP data and can be fooled by tire size changes or sensor calibration issues. A fault in the system or a need for a relearn can trigger the warning.
Summary
The “Check TPMS system” message signals that your vehicle’s tire monitoring system has detected underinflation or a fault in the system itself. Start by checking and correcting tire pressures, inspect for leaks or damage, and perform any required relearn procedures. If the warning persists, have a qualified technician diagnose with the proper tools to identify sensor, wiring, or module issues. Keeping TPMS functioning and tires properly inflated improves safety, handling, and fuel efficiency.
Does AutoZone fix TPMS sensors?
At AutoZone, we carry replacement TPMS sensors for most makes and models. And if you need help resetting the TPMS light, we can offer helpful advice or refer you to a shop in our professional network.
Can I drive my car if the TPMS light is on?
This is why you should maintain proper inflation pressure and try to avoid driving when the TPMS light is on. If you absolutely must drive a short distance on a tire with severely low pressure, drive very slowly and use extreme caution. The tire should be inflated or changed before driving anywhere.
Does Les Schwab do TPMS sensors?
Every time you buy new tires, the professionals at Les Schwab will give your valve stems and TPMS sensors a quick inspection and replace any parts that are worn or not working.
What do I do when my car says check TPMS system?
And take a look at the sticker. Inside your driver's door to find your exact tire pressure settings. Next use a gauge to check the pressure of all four tires.