CEL problem

[Jim Bennett]

My CEL comes on after driving about 5 minutes. But OBD1 scanner provides no codes KOEO. Could it be bad PCM or sensor?

 

[squeak93]

Try another scanner just in case? Year/model etc would help as well. You say obd1 but 96-04 are all obdII.

 

[Jim Bennett]

Mine is 94 Cobra 50 #817 - INDY 500 Pace Car (OBD1)

 

[Mustang5L5]

Mine is 94 Cobra 50 #817 - INDY 500 Pace Car (OBD1)

moving thread to right forum

Procedure on these is a little different. You need to run the codes with the engine off, and then start the engine and run them with the engine running. It's likely you have KOER codes, and not necessarily KOEO or CM codes.


View: https://youtu.be/Hwtm6avQMPc?si=qcsNoDPR2gopZjBk