WOnder if a bad or fatiguing ICP is the source of a check engine light that is intermittent and clears u[p in 20 minutes. 275k on the motor and original injectors. thanks, ROn

 

Do we know what the code is that causes the light? Got a tuner? P1211 is a common code if you have a tuner that clears itself up.

Symptoms can include rough idle, stalling, throttle not responding right, hard start, no start.