Re: Service Engine Soon Light?????
The codes will give you a good place to start looking for the problem, but they don't always pinpoint the real issue. Some of the common codes that come and go are for misfires, AIR, EVAP. But it could be any sensor that is getting old and starting to read out of range. Have it scanned and see if there are any stored codes.
69 Z28 Hugger Orange original factory JL8 brakes, being restored