My 20xe engine is really bugging me now.
Before I had a problem with my ECU light on, I couldn't locate the dianostics plug as its was cut off by previous owner.
Anyway, I thought I had solved the problem by resetting the ECU.
The light went out for a few hours of mad driving, then came on again.
The engine acts exactly the same as when the light was off.
Is there any common faults I can check for to see if I can get the ECU light to go out??