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  1. TJ Wrangler Technical Forum
    I made an oopsie when I was dropping the transmission to change the clutch. I snagged the wire to the O2 sensor. The plug is fine, but it pulled all four wires out of the plug. I think I can just shove them back into the plug, but I don't know which wire goes where. Google has not been very...
  2. WJ Grand Cherokee Forum
    Howdy All, I got a WJ fuel-related mystery. Some of this covered in other threads. But nothing I found with exact set of problems. Besides the threads asked me to start a new one. 2002 Jeep Grand Cherokee Limited WJ 4.7L V8 with California emissions package (4 x O2 sensors) had starter replaced...
  3. WK2 Grand Cherokee Forum
    Anyone done the spacer on the downstream o2 sensor on the pentastar to clear the engine code related to deteriorated cat? I’m getting a new set of cats soon but it’ll take a few months to get here. I just don’t want engine light all the time, does it work
  4. WK2 Grand Cherokee Forum
    I need help guys, I’ve spent thousands on trying to get this sorted no mechanic can find the issue I have a 2014 Grand Cherokee with the 3.6 petrol, I have a check engine light for a p2098, I have done everything, had smoke tests done on the exhaust and intake, I’ve change o2 sensors I’ve...
  5. WK2 Grand Cherokee Forum
    Hello all, I have a 2012 grand Cherokee, 146k miles, and recently had my check engine light come on. Ran the code and it came back with P0430 Low catalytic efficiency. Decided to buy a better scanner as I'm starting to do more and more of my own stuff and saved the attached reports. Trying to...
  6. WK Grand Cherokee & XK Commander Forum
    Working on an 06’ Commander 3.7L v6… Car idles rough and stalls out when in gear. Trouble codes are: P0068: MAP/MAF Throttle Position Correlation? P0113: Intake Air Temp Sensor High Circuit P0137: O2 Sensor Bank 1 Circuit Low P0123: Throttle Position Sensor Circuit High There is also a...
  7. ZJ Grand Cherokee Forum
    I have a '97 ZJ with the 5.2. Some jerk thief stole my cat, cutting my exhaust with a sawzall, cutting the downstream O2 sensor wire. I've driven the jeep a little bit (< 10 miles, sounds AWFUL) but I was expecting it to throw a code or something. My question is, am I going to be running...
  8. JK Wrangler Technical Forum
    2009 X 2DR 3.8 Automatic I am rebuilding the engine after 185k miles because a mechanic friend has donated his time. I'll be doing timing chain, water pump, new cam, checking valves, pushrods, lifters, gaskets, new radiator, fuel tank skid plate, new wheels/tires, wrap, etc. Yesterday we took...
  9. Wrangler General Discussion
    Wondering if anyone has ever seen this issue....or ideas: Check engine light, due to bad rear o2 sensor. Replaced both o2 sensors, check engine light went off. After driving 40 miles, light back on. Mechanic verified with computer that the o2 sensors are working. Reset the light again. After...
  10. TJ Wrangler Technical Forum
    Hi everyone, I have a 2002 TJ X with the 4.0 engine. 115k on engine, good condition but I have an issue at startup. Even when it's cold out there (50 deg.) it has trouble restarting after driving for 5-10 min, temperature never goes above 210. If I wait 10 to 15 min it will start eventually but...
  11. Cheap Tricks & Fixes
    So I'm replacing my upstream O2 sensor on my 1996 Cherokee XJ, and I cannot for the life of me get this ****er off. I've tried heat, I've tried penetration fluid, I've hammered the **** out of it, and it will not budge. I'm worried that if I try any more I'm gonna strip the whole bolt. I'm using...
  12. YJ Wrangler Technical Forum
    Hi all, I’m sure this is somewhere, but the site is vast & a search does not help! I have a 1991 Jeep Wrangler YJ engine, 2.5, 4 cylinder European model there is no plug connector on the car for the O2 sensor as damaged. I have a generic replacement with two white a grey and a black wire. The...
  13. KJ Liberty Forum
    '04 KJ w/ 128K miles... I guess my first post didn't "take" so here goes again. I replaced the driver's side O2/downstream. Put the left side on ramps and that was plenty of room for my 70 year old body to get to it. Since I felt one was bad, I ordered 2. I slid under the pass. side to...
  14. XJ Cherokee Technical Forum
    Been trying to figure this thing out on my own and by looking through other posts, which have been extremely helpful in steering me in the right direction so far. Any help would be greatly appreciated! Before it totally stopped running, it would sometimes die on me after running for awhile. I...
  15. KJ Liberty Forum
    Looking for advice on how much more money to sink into my Liberty. 2004 Limited V6 4 wheel drive with 157,000 miles on it. I bought it used 6 years ago and have put 70,000+ miles on it. About a year ago, two check engine codes kept popping up P0300 and P0303, random cylinder misfiring, and...
  16. YJ Wrangler Technical Forum
    Help me identify 02 on 1990 YJ 2.5 Maybe the PO changed it, I don't know. But the part my local auto parts store says will work, will not work on my Jeep. I am attaching pictures and am hopeful someone here will be able to help me. Thanks! jim PS I am trying to replace because recently when...
  17. Engines & Drivetrain
    Okay, so i recently had my check engine light come on, i hooked my scanner up and it showed P0132. So i ordered a NTK Upstream Oxygen Sensor and replaced it. At the same time, I went ahead and took off the throttle body and cleaned the IAC and throttle body itself. I cleared the code and took it...
  18. TJ Wrangler Technical Forum
    I just bought my son a 2001 TJ to go along with my 05 LJ. We've only had the Jeep a week, passed emissions test two days ago. This morning it threw P0432 code. I have been reading and searching on this forum and have it narrowed down to either the rear most O2 sensor after the pre-cat or the...
  19. XJ Cherokee Technical Forum
    So my downstream o2 sensor wires from my sensor got ripped out and from the harness connector. I actually dont know if there was a spliced o2 sensor or connector but all i see is wires and no connector. Seems like a common problem but i cant tell which wires are the heater wires, signal wires...
  20. WJ Grand Cherokee Forum
    Howdy, I have a P0138 Code on my 99 WJ 4.0. Says it's an O2 sensor...possibly a bad fuse. Both O2 sensor fuses work. I have a non-California emissions Jeep. The best I can tell from actually seeing and diagrams is there are 4 sensors on the Jeep. Two are located underneath where the exhaust...
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