I was also wondering how to test the PCM to see if that could be it.
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2000 GMC Sonoma
Question: P0200 and P0300 keep showing, I just replaced the fuel injectors Any Ideas?
Answer #1Tomiko January 30, 2013, 18:02Journeyman
what do the codes mean?
Answer #2Greg's Orange Auto (8442 Answers) , Orange, CA - (714) 361-9355globalhelper January 31, 2013, 06:23Master
which motor do u have? po300 is random misfire and po200 is fuel issue.seek diag and quit wasting money guessing