1994 GEO PRIZM CHECK ENGINE LIGHT ON CODE 12

  • Tiny
  • rsesche
  • 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

Tuesday, September 20th, 2011 AT 3:42 PM

1 Answer

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,555 posts

Code 12 is no rpm signal to the ecm. If the engine is off and key on, this is normal
if it is running, then you have a issue with either the crank sensor or the distributor.

Roy

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Tuesday, September 20th, 2011 AT 4:50 PM

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