1995 Pontiac GrandAm Check Engine Light..

1995 PONTIAC
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PAULROWLETT
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I recently purchased a 1995 Pontiac GrandAm and the check engine light comes on when I accel then let off the gas..What would cause this also how do I check the codes? The connector looks like OBD1 but doesnt have the same pin outs..Also any clues how to change the 3 spark plugs in the rear side of the motor?
Jan 11, 2006 at 2:38 AM

What to check next

Diagnostic guidance. Suggested checks and possible repairs are separate from the owner's reported results.

Identify the exact engine and diagnostic system, then use a compatible scan tool to retrieve codes. Obtain the engine-specific plug-access procedure, including any required support equipment.

Guidance references and applicability

Source: This question and its visible discussion, including any clearly labeled editorial corrections. Owner reports are distinguished from other participants' experiences. Follow-up guidance is not a confirmed diagnosis.

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AI-ASSISTED GUIDANCE · REVIEWED BY 2CARPROS
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2CARPRO JACK
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2CarPros editorial correction - October 12, 2026

The earlier scanner recommendation and suggestion to improvise engine movement have been withdrawn pending identification of the exact engine and diagnostic system. Use a scan tool verified to communicate with this 1995 Grand Am; connector appearance alone does not establish compatibility. For rear spark-plug access, follow the engine-specific procedure, including any required support and restraint. Do not loosen mounts or move the engine without the proper procedure and equipment.
Jan 11, 2006 at 7:14 AM

Discussion summary

1995 Pontiac GrandAm Check Engine Light..

The owner of a 1995 Grand Am reported an engine warning during acceleration or deceleration, uncertainty about its diagnostic connector, and difficulty accessing the rear spark plugs.

Reported outcome: No codes, component diagnosis or completed service were reported.

Connector appearance alone did not establish scan-tool compatibility. The earlier suggestion to improvise engine movement was withdrawn.

Read the original discussion

AI-ASSISTED SUMMARY · REVIEWED BY 2CARPROS
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