I have an 05 wrangler and the damn Check Engine Light is pissing me off. I keep pulling codes P0153-O2 Circuit Slow Response(Bank2 sensor1) and P2098-Post Catalyst fuel trim system too lean bank 2.....NOW i replaced the bank 2 pre-cat o2 sensor and the light went off for 250 miles but then came back on with the same 2 codes..... Im a BMW mechanic and Im very good with cars, but this damn check is driving me crazy!!!! ive heard a few people say they had the same codes come one, but noones mentioned a solution....can someone help me, i refuse to go to the dealer because I work in one and I know how they are....but if it comes down to needed teh computer reprogrammed then i guess i'll have to go.....
After having owned my 2002 TJ for only a week my check engine light has now come on. Surprise, Surprise!
Reading your new thread, and considering your mechanical expertise, I was hoping you could advise me as to what is my next best step? I have no idea how to 'pull a code' (whatever that means!).
Thanks for any advise you can provide - sorry I couldn't help you with your problem. I will, however, read the responses with interest. GOOD LUCK!
The po153 and the p2098 - both codes relate to mixture. Both codes can be set by an exhaust leak.
The exhaust pulsates, drawing air in between pulses. That air - oxygen - gets on the sensors and screws up the mixture and sets the codes.
Get underneath with a strong pencil beam flashlight in a dark garage or moonless night. Have someone spray light oil - or WD-40 down the throat. The exhaust will get smokey, the pencil beam flashlight will show where it's getting out.
Then just fix the leak.
It's no wonder the country is falling apart - stupidity abounds!
Well mixture problems all went away but now im throwing P0152-O2 circuit high voltage (bank 2, sensor 1),P0153-O2 circuit slow response (bank 2, sensor 1) , and P0157- O2 Circuit Low Voltage (bank 2, Sensor 2).... NOw i did replace the bank 1 sensor 1 about 8-9 months ago (CEL has been coming on and off the past 9 months) i replaced it with a bosch sensor, and now im reading that Jeep + Bosch O2 = problems.... ive checked the O2 voltages while the jeep is running and they aer operating normally, .100-.800V checked for leaks havent seen heard or found any... replace the bank 1 sensor 1 for dealer sensor?? im tired of that damn orange "check engine" staring me in the face and causeing me to get poorer MPG.... soo asap advice is greatly appreciated
I was getting those codes randomly for a couple of years. Mine turned out to be a leak at the manifold. Had that repaired and the light hasn't come back on...........yet! It would usually come on when it was rainy or high humidity and then go back out after 10 or so restarts.
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You never responded to this call for help thread almost a year ago. You never said what you found.
That's not very polite. But now you want help again?
Sounds like the diagnosis is still the same.
HAHA I appoligize Rich, but I do have a good reason!! I never found the problem... light would go off for a month then come back on for a while and back off again... i've driven with my scan tool attached and monitored the O2s and the voltage is always right were it was suppose to be, thought i had a bad O2 sensor so i had it replaced at autozone... its SOOO DAMN FRUSTRATING because i can fix ANYTHING on a car, i just have the biggest problem with emission problems... and damn thing is driving me crazy but now im due for an inspection so i gotta sit down and actually fix it!
I'm currently having problems with P2098 and P0153 on my 2005 TJ X. I would like to avoid throwing parts at it. I don't see any adherent Exhaust leaks and the Jeep runs and Idles fine. Does anyone have any updates to this thread? Has replacing O2 sensor or sensors fixed this problem for anyone?
Hey Blu.. I ended up having to go dealer and get a mopar O2 sensor! Car doesnt run well with non mopar parts... Also because i let it go for so long ended up destroying my Cat Converter... Ended up having to replace them as well. So go get the correct dealer O2 sensor and see where that gets ya! Good luck
Thanks for the input OffRder. The garage I took the jeep to is currently looking into a Jeep Service Bulletin addressing P2098 that updates the PCM. maybe somewhere between that and or a Mopar OS sensor I can get this resolved.
In this, or another forum when I pulled the P0152 code I swapped the O2 sensor, and then still had the problem, so I checked the plugs. The back three plugs were bad so I swapped all six and was good, now I am pulling this code. Would it be better to swap the downstream O2 sensor or go to a dealer and try to get the PCM reflashed?
I have had this problem for about two years. I did a "Dukes of Hazard" stunt off a small hill and the landing impact took out an axle shaft and cracked the cat's interior. A few weeks latter the damaged cat plugged the exhaust... so I had a shop replace both of the mini-cat's under the exhaust manifold. This P0153 code showed up a month or so latter. It was annoying but had no real impact on engine performance, or fuel mileage. It does however mean I can't pass an emissions test because the CEL or MIL is always on.
So far, the exhaust is not leaking... nothing noticeable at least... and swapping out O2 sensors with new NGK (NTK is the same thing) as per OEM... has not helped. Some threads say I should inspect the MAF or MAP to ensure it is working right.... (Anyone know how to test one of those and where to find it on a 4.0L?)
The other issue I've seen talks about having the 'heater circuit' on those O2 sensors working correctly. On that point there seams to be an issue with the way these Wranglers were wired from the factory, and a wire modification that should be done per a Service Bulletin dated Feb, 09, 2007. RE: I/M Readiness Check.
Note that one of the symptoms here is that it takes 100 plus miles to trigger this MIL or pass inspection and have the PCM ready to be inspected.
Search other threads for a link to the service bulletin. I think this is where I go next to see if it fixes the issue.
Also note that an exhaust leak, even a small one can cause this. If only 1 bank is throwing the code P0153 but not P0159 for bank 2, especially if the damaged cat was for bank 1, I would suspect a small leak is the cause. Here are 2 links about that.