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What does engine codes 12, 33, 35, mean?

1991 Jeep wrangler 2.5L i did the key cycle and i come with these codes 12, 33, 35,

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oilyspill
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SOURCE: what codes 12. 33. and 35. mean on a 1991 Jeep wrangler 2.5L?

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."

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1 Answer

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


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?

Apr 16, 2017 | Jeep Cars & Trucks

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

Mar 18, 2017 | Jeep Cars & Trucks

1 Answer

Where is the pcv valve in a 1991 jeep wrangler 4 cylinder


where is it, on a 2.5L I4 jeep. 1991. ok. first ever post with engine size.
bravo that. amazing....
the FSM covers this. factory service manual;,.
ok, i see you are reading books or web sites that have generic tuneup information, not relate to real jeeps, yes?
or bob with a toyota told me to change it out? yes?

Guess what?, there IS NONE.
it only has and ORIFICE.
and sure it can clog, and does, in fact i drove for 500,000 miles
in 3 jeeps. and cleaned it vast times.
on one car , the grommet got old and it the orifice collapsed.
and i had to buy a new one from jeep.
see word FIXED below.?
when it clogges, the engine leaks oil
and the oil pukes (backups) and dumps oil on the air cleaner.
there is no PCV valve, on this engine. but that dont mean its service free.






1d4c96fd-4de0-4f15-a00c-001f18919664.jpg

Sep 29, 2014 | 1991 Jeep Wrangler

1 Answer

How to install a serpentine belt on a 1991 jeep wrangler with a 2.5 engine without power steering


There should be a sticker in the engine compartment that shows the routing and you should be able to hold the tensioner back with a 3/8's ratchet with a long handle.

Jul 07, 2014 | 1991 Jeep Wrangler

1 Answer

How do I replace an a/c clutch relay? I am getting this light indication code 12 33 55 which results to this. There is not even an a/c in my jeep anyway.


#12 "Direct battery input to PCM was disconnected with in the last 50 key on cycles"
This denotes the battery has been disconnected or replaced recently and should just be reset. It is more informational than anything.

#33 "An open or shorted condition detected in the A/C clutch relay circuit"
If you have no A/C the instructions are to ignore this message.

#55 means end of codes. No more codes stored. Problem codes, if any, will have been displayed before that.

Jun 29, 2011 | 1991 Jeep Wrangler

1 Answer

Where is the oil sending unit located on a 1991 jeep wrangler 4 cylinder?


Under hood, driver side, lower engine area, front of distributor, mounted in engine block.

It looks looks this;




ledsled378_6.jpg

Nov 25, 2010 | 1991 Jeep Wrangler

1 Answer

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


code 12 is a normal code when the engine is not running. it means there is no distributor reference. When this code flashes during the key cycle, it is normal.

Sep 08, 2010 | 1992 Jeep Wrangler

1 Answer

I Need to see the fuse box diagram for a 1991 jeep wrangler


I'm assuming you mean the box under your dash

if this isn't what you want let me know
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Apr 05, 2010 | 1991 Jeep Wrangler

1 Answer

1989 jeep wrangler starts jumping and backfiring


Start with the basics...meaning check the spark plug wires and spark plugs. While under the hood, inspect all hoses for a vacuum leak(s). Then turn the ignition key on-off-on-off- on...leave in the on position and write down the number of flashes the check engine light indicates....2 flashes = #2....pause.....3 flashes = #3.
Let start from here. Are you able to perform engine repairs or diagnostics???

Jan 17, 2010 | 1989 Jeep Wrangler

2 Answers

2002 Jeep Wrangler 4.0 When Driving the Engine Dies


Put the key in the ignition and turn it on and off (3) times without starting the jeep, leaving it in the on position count the (1) flashing indicator Light, Eg: (5) flashes, Then there will be a pause, then it may flash (3) times, this is a code #53. Keep your Eye on them and write them down. If you should miss (1) Repeat as many times as needed, Info: A #55 means there are no codes!!

May 30, 2009 | 2002 Jeep Wrangler

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