o2 sensor

Hi folks, '05 TJ owner here, though I used to own a '97 TJ and an '01 XJ. Thank you so much for being such a good resource — I have used so many of these posts over the years to problem-solve issues that have come up. My new (to me) '05 Sport just surpassed 150k miles. Over the course of the...

Hey guys, first time poster here. Bought my '06 4.0 (auto trans) a little over a year ago. Had a lit CEL for a faulty o2 sensor when I bought it. Recently the CEL has begun flashing, but only at idle once up to operating temp (wont flash at idle from cold start). It also starts to smell like...

About a month ago I got a 1999 TJ with 66,000 miles on it. This jeep is a right hand drive and is in great condition cosmetically. Interior was well maintained, frame is undercoated with zero rust. The gentlemen I got it from told me there was a sputter in the engine but it was still drivable...

Looked at a lot of posts, but can’t find anything recent. ‘06 LJR, 114k, gas mileage has always been low, ~10mpg on 33s. I have replaced all four O2 sensors with NGK, and just replaced the catalytic with a new Magnaflow. Just replaced the fuel injectors with 4-hole Bosch from Precision Auto...

I have a high-pitched pitched almost electrical sound for a short time after start which is new. When going downhill only the jeep sometimes idles quite low, almost stalls unless the engine is rev'ed. Recently done spark plugs, tps, cleaned iac. doesn't look like leaks, the high-pitched whine is...

2018 Jeep Wrangler Unlimited Sport 4dr with 3.6l engine running rough and showing Error Codes P0171 and P2096 (showed P0300 for a bit, but has not returned since clearing). System Too Lean Bank 1 and Post Catalyst Fuel Trim System Too Lean Bank 1. Where should I start? Put some Seafoam in and...

Hello guys, My 05 TJ 4.0 6 speed had a check engine light few weeks ago i got P0153 code, replaced both upstream O2 sensors with NTK/NGK and after around 220 miles the CEL is back with P0133 and P0153! What should i look for now? TIA NTK 23018 NTK 23160

A few months ago I started intermittently getting the CEL code p-0133. So I got a replacement sensor from NTK and tried replacing it. I had zero luck since it was seized so I sent my jeep and the NTK sensor over to my mechanic who was able to put it in for me. Cleared my check engine light for...

I recently replaced all of my O2 sensors (Thread: https://wranglertjforum.com/threads/check-engine-light-flashed-while-driving-recommendations.67087/) and felt like that had been successful. No new CELs, no rough idle, and no hesitation. However, at the time I didn't really watch any live data...

New to the Forum.... I have a 1997 TJ 2.5L. I have been reading threads on Power Loss/Sputtering and Backfiring problems. Replacing the O2 Sensors with a NTK sensors seem to be one of the common solutions. https://wranglertjforum.com/threads/jeep-is-sputtering-and-backfiring.12758/ Problem...

I recently finished the rebuild of the top half of the motor on my 2006 TJ. I installed Hooker black heart headers after having the head rebuilt. also had it straight dualed back to a Borjla exhaust. I rebuilt it to specs and haven't had any issues with it after 2500 miles of driving since I got...

I have a 2001 TJ 4.0 automatic (California emissions). I have had idling issues since I bought it a little over a year ago. Since it has been doing it from day one I never thought twice about it. Last weekend I had someone riding with me ask if I had replaced my O2 sensors. When I went to locate...

Okay, I'm super new to this so bear with me... I have a 2003 Jeep Wrangler Sahara. Well, my daughter has. Anyhow, she launched a rod through the block. This was due to some problem that caused the check engine light to come on. Long story short... New motor is in and same problem: The Jeep...

Hi all, I have a 2000 Jeep with 157000 miles on it and I've been having some trouble with it starting and running. I've owned the car for about 2 years now and for the whole time that I've owned it It almost never starts on the first crank, but always on the second. there are some other problems...

I will try to make this short and sweet. Last week I filled up my 2000 Jeep TJ and minutes later the check engine light came on. The code that came back was P0420 Bank 1. The check engine light remained on all week until I got gas today and, boom, the check engine light is gone. I ran my OBD...

So i replaced my o2 sensors with the NGK sensors about 7k miles ago. Didn’t have codes for a while, but just checked it today and I’m pulling codes P0031, p0051, & p0136 (all related to o2 sensors). I’m also pulling codes for p0303 (cylinder 3 misfire) and p0455 (evaporation emission system...

I recently purchased a 04 tj. I kept getting codes for a bank 2 sensor 2 o2 sensor. Just right now I decided to hop down their and see what’s going on and to my surprise it wasn’t even connected. But now I can’t find where it connects to

Hey Guys, So recently I was on my way home and at a stoplight had a misfire in cylinder 2, and my exhaust sounded funny and fluttery, I was like 8 minutes away so I decided to drive it home and coast down hill. Long story short, I replaced the spark plugs, still had issues. I checked my coil...

Hi folks. I was hoping to get some opinions on a problem I have as I could not find a thread that would directly answer it. A little background- 3 months ego I bought a 2005 4.0L manual TJ with 125,000Km (=78,000 miles). It has no obvious mods or upgrades besides 31' tires and a roo bar (I'm in...

My 2004 Wrangler Sahara, automatic, 4.0L threw a P0158 code today: P0158 2/2 O2 Sensor Shorted To Voltage Oxygen sensor input voltage maintained above normal operating range. 1. Should I replace this sensor? 2. Where is this sensor located? 3. Does anyone have the part # for this sensor...