If the TPMS warning light stays on after inflating your tyres, the system may simply need to be reset. This is a common situation after adjusting tyre pressures, changing tyres, or rotating wheels.
The Tyre Pressure Monitoring System (TPMS) is designed to alert drivers when tyre pressure drops below a safe level. Once the pressure has been corrected, the system sometimes needs a short drive or a manual reset to recalibrate.
In this guide, we explain how to reset the TPMS warning light, why the light appears, and what to do if the system refuses to reset.
What Is TPMS?
TPMS (Tyre Pressure Monitoring System) is a safety feature that monitors the air pressure inside your tyres and alerts you when pressure drops below recommended levels.
The warning usually appears as a yellow dashboard symbol shaped like a horseshoe with an exclamation mark.
The purpose of the system is to:
- Reduce the risk of tyre blowouts
- Improve vehicle safety and handling
- Maintain proper fuel efficiency
- Prevent uneven tyre wear
Most vehicles manufactured in recent years include some form of TPMS.
Types of TPMS Systems
There are two main types of tyre pressure monitoring systems.
Direct TPMS
Direct TPMS uses pressure sensors installed inside each wheel. These sensors measure the actual tyre pressure and transmit the data to the vehicle's computer.
- Accurate pressure readings
- Individual tyre monitoring
- Sensors located inside the wheel
Note: sensors contain small batteries that eventually wear out and may require replacement.
Indirect TPMS
Indirect TPMS does not measure tyre pressure directly. Instead, it uses the vehicle's ABS wheel speed sensors to detect changes in wheel rotation that indicate lower pressure.
- No physical pressure sensors
- Uses ABS data to estimate pressure changes
- Requires recalibration after tyre adjustments
This system is simpler but less precise than direct TPMS.
Why the TPMS Warning Light Comes On
A TPMS warning light can appear for several reasons. The most common causes include:
- Low tyre pressure
- Sudden temperature drops
- Tyre replacement or wheel rotation
- New tyres installed
- Sensor battery failure
- Sensors needing recalibration
How to Reset the TPMS Warning Light
The reset process varies slightly between vehicle models, but most systems follow one of three methods below.
Many vehicles reset automatically after driving. Inflate all tyres to the recommended pressure, start the vehicle, then drive for 10-20 minutes. During this drive the system recalibrates and the warning light should turn off. This is the simplest and most common reset method.
Some vehicles include a dedicated TPMS reset button, usually located beneath the steering wheel or inside the glove compartment. Turn the ignition to the ON position (without starting the engine), press and hold the button until the TPMS light blinks three times, then start the engine and drive for several minutes to complete recalibration.
Modern vehicles often allow TPMS reset through the infotainment or dashboard menu. Turn the ignition on, navigate to Vehicle Settings, select Tyre Pressure Monitoring, then choose Reset or Relearn TPMS and confirm. The vehicle usually requires a short drive afterwards to complete the recalibration.
How to Reset TPMS After Inflating Tyres
If the TPMS light appeared because of low tyre pressure, resetting the system usually involves three straightforward steps.
Three steps to clear the warning
| 1 | Inflate all tyres to the correct pressureUse the pressure listed in the vehicle manual or door frame sticker. |
| 2 | Start the vehicleCheck that no other warning lights are showing on the dashboard. |
| 3 | Drive for 10-20 minutesThis allows the system to recalibrate and the warning light to clear. |
In many cases, the warning light will turn off automatically during this drive. If the light remains on, a manual reset or sensor inspection may be required.
Correcting the tyre pressures and driving for a short distance is enough to clear the warning in the majority of situations.
What If the TPMS Light Won't Turn Off?
If the TPMS warning light remains on after resetting the system, the issue may be related to the sensors rather than tyre pressure. The most common causes of a persistent warning include:
Faulty TPMS sensor
A damaged or failed sensor will keep the warning active regardless of tyre pressure.
Sensor battery failure
TPMS sensor batteries typically last 5-10 years. Once depleted, the sensor requires replacement.
Sensor not programmed
After a tyre replacement or wheel rotation, the sensor may need reprogramming to sync with the vehicle.
Damaged during fitting
Incorrect tyre fitting can damage sensors, causing a persistent fault warning.
Wheel replaced without relearn
A new wheel fitted without carrying out a sensor relearn will trigger a persistent TPMS warning.
Diagnostics required
When self-reset methods fail, a technician can use specialist equipment to pinpoint the exact fault.
In these situations, a technician can perform TPMS diagnostics, sensor relearning, or sensor replacement. QuickGrip provides mobile TPMS diagnostics and sensor services in St Albans and surrounding areas, including TPMS fault diagnosis, sensor relearning and programming, TPMS sensor replacement, and wheel and tyre inspections - all carried out at your location without visiting a garage.
Is It Safe to Drive With the TPMS Light On?
Driving with the TPMS light on is not recommended for extended periods. While the system itself does not affect vehicle operation, the warning may indicate low tyre pressure, which can cause reduced braking performance, poor handling, increased tyre wear, and a higher risk of tyre failure.
If the light is steady
- Likely a pressure issue
- Check all four tyres immediately
- Inflate to the correct pressure
- Drive for 10-20 minutes to reset
- Monitor to see if light clears
If the light is flashing
- Likely a sensor fault
- Self-reset may not resolve it
- Sensor diagnostics required
- Book a mobile TPMS inspection
- Do not ignore a persistent flash
Key points from this guide
- A steady TPMS light usually means low pressure - check and inflate tyres first.
- A flashing TPMS light typically points to a sensor fault rather than a pressure issue.
- Most pressure-related warnings clear after inflating tyres and driving for 10-20 minutes.
- If the light persists after resetting, sensor diagnostics or replacement may be needed.
- TPMS sensor batteries last 5-10 years - older vehicles are more likely to have sensor faults.
- A mobile tyre technician can carry out all TPMS diagnosis and sensor work at your location.