The Tyre Pressure Monitoring System (TPMS) warning light — a horseshoe-shaped symbol with an exclamation mark — has been mandatory on all new UK cars sold since 2014. When it illuminates on your Cardiff vehicle's dashboard, it means at least one of your tyres has dropped 25 percent or more below the recommended pressure. This can indicate a slow puncture, a tyre that has gradually lost air over time, or in some cases a sensor fault.
When the TPMS warning light appears in Cardiff, find a safe place to stop and visually inspect all four tyres. A severely flat tyre will be obvious. If all tyres appear superficially normal, drive carefully to the nearest garage or air compressor to check and adjust pressures, then monitor for the light returning. If the light stays on after correcting pressures, or if one tyre is consistently lower than the others, you likely have a slow puncture that needs professional attention.
Some tyre sealant products (like the emergency foam sealants often provided in modern cars without a spare) can damage your TPMS sensors — always flag this to your tyre fitter. Royal Mobile Tyres Cardiff offers mobile puncture diagnosis and repair across all Cardiff postcodes. If your TPMS light is on and you suspect a slow puncture, call 029 22714889 and we will come to your Cardiff location to inspect, diagnose and repair the issue at your home or workplace.