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What codes 12. 33. and 35. mean on a 1991 Jeep wrangler 2.5L?

The engine will start and run i did the key cycle and it show the codes list above.

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  • Joe Russell Apr 18, 2017

    yes it is running ok at the moment.

  • jack layton
    jack layton Apr 18, 2017

    It's your decision. Either drive it like it is and hope for the best or replace it? I hate to tell people to replace anything, I can't see anything from here.
    Usually, if a tap test gets it working, you replace it.



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Code 12-- battery has been disconnected once in so many ignition cycles.
code 33 is ac compressor clutch.
code 35 is radiator fan relay circuit issue. Does the radiator fan work ok?
Are you having problems with your vehicle? What kind of problems?

Posted on Apr 16, 2017

Testimonial: "the problem i was having the engine wouldn't start wasn't getting no spark at coil and spark plugs and no pulsa at fuel injectors so i did a key cycles to check for codes the check engine light wasn't working so i took a hammer and hit the ECU and the check engine light start back to working and the engine started up."

  • 1 more comment 
  • jack layton
    jack layton Apr 17, 2017

    Good job, sounds like ecu problem.

  • Joe Russell Apr 18, 2017

    do i need to replace the ECU?

  • jack layton
    jack layton Apr 18, 2017

    That's what it sounds like or the wiring connector. Is it running ok at the moment?



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