A fault code doesn’t yet mean the unit or sensor itself is faulty: often it’s the plug and connector leading to it.
Possible causes
- A puncture or a leaking valve
- Colder weather: tire pressure drops in frost
- The tire was inflated but the warning wasn’t reset
What you can do yourself
- Check all tire pressures with a gauge and inflate them to the placard on the door pillar or fuel flap.
- If a tire is visibly low or keeps losing pressure, look for a puncture; don’t drive on a flat tire.
- After inflating, reset the warning with the button or in the menu as described in the owner’s manual.
Stop and don’t drive on if:
- The red brake light is on, or the brake pedal feels soft or sinks
- The steering became very heavy, or the car pulls to one side when braking
If the scan tool shows the code with a suffix after a dash (for example, C0031-1D), that’s the fault detail: 01 — general electrical failure, 1D — circuit current out of range, 29 — invalid signal, 2F — erratic signal, 62 — signal doesn’t match the others.
The explanation comes from the error code reference in the AvtoElektrik PRO app.