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Unread 08-23-2011, 01:21 PM   #31
19renegade91
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1991 YJ Wrangler 
 
Join Date: May 2011
Location: yarmouth, nova scotia
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im so sorry im the stupid one lol ...over looked that fact of the code reader lol appologies!. codes are 12 33 21 24 55

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Unread 08-23-2011, 01:25 PM   #32
19renegade91
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code 12 is direct battery imput disconnected within the last 50 starts...which i do not remember unhooking the battery...21 neither lean or rich dectet by o2 sensor...prob cause i unhooked it to see if it made a difference...it diddnt really...33 shorted AC CLUTCH RELAY i do NOT have AC..24 TPS above or below acceptable voltage it diddnt read above or below voltage that i could tell...55 end of message lol

Last edited by 19renegade91; 08-23-2011 at 01:40 PM..
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Unread 08-23-2011, 01:39 PM   #33
oldtime_ironman
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1991 YJ Wrangler 
 
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Location: 14304 Niagara Falls, NY
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codes

Quote:
Originally Posted by 19renegade91 View Post
im so sorry im the stupid one lol ...over looked that fact of the code reader lol appologies!. codes are 12 33 21 24 55
Code 21 is oxygen sensor (O2 sensor) or circuit
Code 24 is throttle position sensor (TPS) or circuit

The other codes are pretty normal:
12 is the battery was disconnected before
33 is A/c relay (this doesn't matter if you don't have air conditioning)
55 is end of codes

Hope that helps!
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Unread 08-23-2011, 01:40 PM   #34
jms2021
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http://www.jeepforum.com/wiki/index....k_Engine_Codes

*edit* I was too slow lol!

Last edited by jms2021; 08-23-2011 at 01:42 PM.. Reason: too slow
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Unread 08-23-2011, 01:41 PM   #35
Que89YJ
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1989 YJ Wrangler 
 
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Location: Detroit, Michigan
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21 is the O2 sensor and 24 is the Throttle position sensor. Because you have the codes does mean they are bad, it means they were out of the expected range for the ECU. The O2 is ususally thrown by 1 of 3 conditions 1) bad O2 sensor 2) cracked or lose bolts on the exhaust manifold (look at the bolts in the rear of the exhaust or a crack especially near the collector tubes) or 3) a fuel pressure issue. The TPS is either a bad sensor or a fuel pressure issue. Start by checking for a cracked exhaust since its the easiest. I have a feeling though that the common issue is fuel that you need to rent a fuel guage and see what it says when you are running into the problem. You should be between 31-39 psi.
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Unread 08-23-2011, 01:51 PM   #36
oldtime_ironman
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Quote:
Originally Posted by Que89YJ View Post
21 is the O2 sensor and 24 is the Throttle position sensor. Because you have the codes does mean they are bad, it means they were out of the expected range for the ECU. The O2 is ususally thrown by 1 of 3 conditions 1) bad O2 sensor 2) cracked or lose bolts on the exhaust manifold (look at the bolts in the rear of the exhaust or a crack especially near the collector tubes) or 3) a fuel pressure issue. The TPS is either a bad sensor or a fuel pressure issue. Start by checking for a cracked exhaust since its the easiest. I have a feeling though that the common issue is fuel that you need to rent a fuel guage and see what it says when you are running into the problem. You should be between 31-39 psi.
^^^ X2 the fuel is the common issue between the two
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Unread 08-23-2011, 02:27 PM   #37
19renegade91
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i think i mentioned that i had 31 psi and 40 wit vacc dissconected...and a pint of fuel pretty quick ..
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Unread 08-23-2011, 02:28 PM   #38
19renegade91
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the manifold is starting to crack but i cant see it leak yet ...its not black around the crack or anything
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Unread 08-23-2011, 02:29 PM   #39
19renegade91
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if the TPS is bad . would it explain why its always from 3/4 to open throttle that it mess up performance
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Unread 08-23-2011, 02:33 PM   #40
oldtime_ironman
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Quote:
Originally Posted by 19renegade91 View Post
if the TPS is bad . would it explain why its always from 3/4 to open throttle that it mess up performance
Yeah the TPS would explain a lot. BUT you should know that a cracked exhaust manifold can throw off the oxygen sensor. No matter how small the crack is. Lots of guys here have pulled their hair out over that one.
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Unread 08-23-2011, 02:43 PM   #41
Que89YJ
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Check the sensors and exhaust then.
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Unread 08-23-2011, 03:03 PM   #42
19renegade91
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the exhaust is not leaking near the mani.. infact its not leaking anywhere i can tell exept where its suppose to exit the pipe lol ...espically not near the o2 sensor...and i assume it said the o2 sensor cause i have been driving it with it unplugged to see if it make a difference in performace...it diddnt...its now plugged in again and after driving awhile again i will check codes again to see if it does go away..the only code i cant explain for is the TPS...the manifold is starting to crack at a weld though near the collecter pipe but its not leaking there yet...ill post back tomorow with results..sorry for being a pain
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Unread 08-23-2011, 03:06 PM   #43
oldtime_ironman
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Quote:
Originally Posted by 19renegade91 View Post
the exhaust is not leaking near the mani.. infact its not leaking anywhere i can tell...espically new the o2 sensor...and i assume it said the o2 sensor cause i have been driving it with it unplugged to see if it make a difference in performace...it diddnt...its now plugged in again and after driving awhile again i will check codes again to see if it does go away..the only code i cant explain for is the TPS
Make sure to clear out the old codes by disconnecting the battery for a few seconds first. Then get back to us with whatever codes it shows after that.
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Unread 08-23-2011, 03:24 PM   #44
19renegade91
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yes disconnect battery thats what i ment haha sorry ill let you guys know tomomow im signin off now .thanks so much for your help
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Unread 08-23-2011, 03:34 PM   #45
Que89YJ
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You need to disconnect the battery to clear the fall codes. Drive it for 20 minutes to get it to go into closed loop and read all the sensors. Then re check fault codes.
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