Mechanics

CHECK ENGINE LIGHT ON CODE 12

1994 Geo Prizm • 200,000 miles

Car runs well but check engine light came on a few days ago. I tried pulling ECM fuses but code came right back. What should I do next and can I still drive the vehicle. Also it is impossible to make a donation on your site. It keeps telling me "donation must be at least 2 dollars" it does not matter what sum greater than or equal to 2 dollars I enter.
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Rsesche
September 20, 2011.



Code 12 is normal if the engine is off and the key on. If it is running, then it is a problem with the computer not seeing a rpm signal either from the crank sensor or distributor.
You need a shop to verify and confirm and give you a bid.

Roy

ASEMaster6371
Sep 20, 2011.
It is when running. Thanks for the quick response

Tiny
Rsesche
Sep 20, 2011.
You need to find out which part is at fault. It will not clear till the problem is fixed. Find a shop familiar with OBD1 systems to check this out for you.

Roy

ASEMaster6371
Sep 20, 2011.