1994 Mercury Grand Marquis Oil Light On

MERCURY MARQUIS
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MIKESRULEZ
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  • 1 POST
i just bought a 1994 grand marquise with an 4.6. It runs fine but all of a sudden my oil light came on while driving, I checked and its level is fine, i replaced the oil pressure switch..my check engine light came on, then as i drove it went out but then my oil light came back on...please help[/b]
Nov 12, 2006 at 6:13 AM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
Go to autozone and let them pull the code out of the PCM, they do it for free. Then let us know if you need more help. Post the code (s). for us to help! I would also recomend you get the oil pressure check with a gauge!
Mar 7, 2007 at 10:40 AM

Suggested Repair

Have the PCM codes read for free at an auto parts store and post the codes. Also verify actual oil pressure with a mechanical gauge rather than relying only on the warning light or the replaced pressure switch.

Conversation Summary

The owner of a 1994 Mercury Grand Marquis with a 4.6 engine says the oil light comes on while driving even though the oil level is fine. After replacing the oil pressure switch, the check engine light came on, then went out, and the oil light returned. The expert recommends a free PCM code scan and an oil pressure test with a gauge.

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