TPMS — low tyre pressure
The amber tyre-with-exclamation icon warns of low pressure in one or more tyres. TPMS (Tire Pressure Monitoring System) is mandatory on vehicles sold in the EU after 2014.
What this indicator means
TPMS comes in two flavours: direct — pressure sensors in each valve stem transmit over 433 MHz radio; indirect — computes pressure from wheel-speed differences via ABS sensors. The indicator fires on a >20% deviation from the reference or a sudden change (blowout).
Common causes
- Punctured or under-inflated tyre (one of four below the others)
- Seasonal temperature swing: cold air drops pressure by 0.1 bar per 10 °C
- After a wheel or tyre change the system was not re-adapted (no reset)
- TPMS sensor battery depleted (5–7 year lifespan)
- Sensor failed after a kerb impact
- New wheels installed without TPMS sensors
What to do as a driver
Check all four tyres with a gauge. The reference is on the fuel-filler flap or driver door (e.g. 2.2 bar front / 2.4 rear). Inflate to spec. If the light returns within a day — hunt for a screw puncture or valve defect. After a seasonal change, run TPMS reset in the on-board menu.
Safety
Important, not critical: continue to the nearest tyre shop. On an obvious blowout — swap to the spare.
Related DTC codes
- C0750
- C0755