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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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  • Jeep Master
  • 3,501 Answers

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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1 Answer

Where can i get a engine control module repair for a 1991 Jeep wrangler 2.5L?


in NO ORDER !
the stickers must match , do not guess.
ebay,? '
http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.X1991+jeep+wranger+ecu.TRS0&_nkw=1991+jeep+wranger+ecu&_sacat=0


or any auto store that sells CARDONE rebuilds.
Cardone does not sell direct, see the full lest of ECU? only 4 and must match yours.

http://www.cardone.com/find-parts/vehicle-parts-listing?make=Jeep%20Trucks&model=Wrangler&year=1991


yes your code 55 is dead. ecu is dead.

or car-parts.com


http://www.car-part.com/cgi-bin/search.cgi


warning there are
2.5L, USA FED< USA CALIF and CANADA ECU and may be for transmissions. (match the numbers (sticker #)
it does not need programming.

jeeps shows, not in stock. NIS,NLA

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1 Answer

Do a 1991 jeep wrangler 2.5L have a ignition control module, crankshaft position sensor and a distributor pickup coil?


posted now 3 times why not just do one post,

answers;
yes, yes and yes.
easy no
where,
well the CKP in on the bell housing at flywheel edge with 3 wires.
CMP is in the base of the distributor cam sync its called, and has small wires exiting the distrubutor and is there.

the ECU is on the fire wall next to brake mc

you fix cars, but are not electric savvy
and no mitchells account,
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i see you use fixya to avoid books,
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1 Answer

94 wrangler dies in gear


You don't need a scanner. If you cycle the key off and on 5 times, the codes will start flashing. Here is a link to jeeps and their trouble codes. There aren't that many in the older OBD-1 systems.
https://www.2carpros.com/articles/retrieve-trouble-codes-for-chrysler-dodge-plymouth-odb1-1995-and-earlier-car-mini-van-and-light-trucks

If you have no trouble codes, check fuel pressure. Multiport injection is high pressure, above 40psi, but Jeep would have specs.

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1 Answer

Trouble code dtc 12. what should i be looking at to fix it


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Sep 08, 2010 | 1992 Jeep Wrangler

1 Answer

I have a 2004 Jeep Wrangler, when the engines is running the engine light came on and stay on. Why is that ?


It could be as simple as a loose fitting gas cap.
Turn the key on and off 3 times, on the 3rd time leaving it on.
Depending on your system, if you have a digital odometer, an error code will be displayed.
If that doesnt happen, the engine light will start flashing. Start writing down how many times it flashes per interval. It may flash 3, then stop, then flash 4, then stop, and finally flashy just two times. This means it is number 342.
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Aug 17, 2010 | 2004 Jeep Wrangler

1 Answer

Gas gauge always shows above full with key on . key off goes to empty.


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Sep 23, 2009 | 1991 Jeep Wrangler

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Codes


your jeep showed the done message because as im sure you were turning the key on and off to try to start the car this also the method of doing the self check of the diagnostic trouble codes(DTC) and it prompts done when it is finished displaying the DTC's

Jun 04, 2008 | 2001 Jeep Wrangler

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