My new-to-me project car is throwing code 51 after running for a couple of minutes. The Service Engine Light takes something like 1 - 3 minutes to display and the only code stored is 51. I'll be replacing the alternator a little later today (seems to have a bad voltage regulator; the lights flicker) and I'm praying that does the trick. Anyone have any pointers to offer?
- Replaced the PCM; no change in symptoms
- Fans kick on when SEL turns on
- Scanner can only pull the code when I set the model year to 92' in scanner (this scanner)