Thread: Ford Focus tyre pressure warning

Can your electrician not clear the codes via the OBDII port?

Usually the tire pressure monitoring is done via the ABS sensors. After balancing the tire inflation, you reset the ABS sensors (which essentially locks in the ABS sensor pulse rate for the rolling circumference of the tire based on its inflated diameter - smaller dia, causes faster pulses, which is effectively what happens with a partially deflated tire). If the computer sees a change in the pulse rates, it will raise and alarm.
Seems a bit strange that all four wheels would be faulting???

Do you have an ABS warning light up?
Do you have the OBDII fault codes?