Service engine light

Asked by TCGrandprix Mar 23, 2024 at 04:15 PM about the 1994 Pontiac Grand Prix 2 Dr SE Coupe

Question type: Maintenance & Repair

i have re-ocurring service engine light randonly coming on.  have changed all
sensors, plugs, wires, coils , electronic ignition and computer. compression is
160-170   
1994 Grand Prix  what could i be missing

3 Answers
155,195

james answered 3 weeks ago

What trouble codes do you have? This is an OBD I vehicle so you can get the codes using a paper clip. Jim

Mark helpful

TCGrandprix answered 3 weeks ago

it's a OBD 1.5 has OBD 1 connectore but wires not in right place for paper clip or STD OBD jumpering it has to have special code reader and I havent found any one local including GM dealer who could read codes

Mark helpful
155,195

james answered 3 weeks ago

Try ebay or Faxon Auto Literature, they have a website, for a factory shop manual that will explain how to get the trouble codes out of it. Unfortunately, without the codes, you're just going to keep throwing money and parts at it. Jim

Mark helpful

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