That tyre pressure warning light on your dashboard tells you more than you might think. We explain how TPMS works, why it triggers and what to do when it lights up.
The Tyre Pressure Monitoring System — universally known as TPMS — has been mandatory on all new cars sold in the UK since November 2014. Understanding what this system does and how to respond correctly to its warnings can prevent dangerous tyre failures.
1Direct vs Indirect TPMS
Direct TPMS uses pressure sensors mounted inside each tyre or on the valve stem to measure actual pressure and transmit readings to the dashboard. Indirect TPMS uses the ABS wheel speed sensors to detect when one tyre rotates slightly faster than the others, indicating lower pressure.
2What the Warning Light Means
A steady TPMS warning light means the pressure in one or more tyres is below the threshold — typically 25% below recommended. Check all four tyres with a manual gauge as soon as it is safe to do so. A flashing light that then stays on usually indicates a sensor fault.
3Resetting After Pressure Correction
Many TPMS systems require a manual reset after tyre pressures have been corrected. The procedure varies by manufacturer — consult your owner's manual for the specific method. If the light returns shortly after resetting, one tyre has a slow puncture requiring professional investigation.
4TPMS and Mobile Fitting
When tyres are replaced, TPMS sensors must be carefully removed and refitted or replaced if they are damaged. Some direct TPMS sensors also require reprogramming after a tyre change. A professional mobile tyre fitter will handle this as part of the fitting process.
Bradford Mobile Tyres technicians are trained to service and reset TPMS systems alongside every tyre fitting job. If your warning light is illuminated, call us for an on-site diagnostic and same-day resolution.
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