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Topic Review (Newest First)
07-12-2011 05:11 PM
Cassie2005LJ hey rrich, thanks for post. It cleared up a lot.

"If the dealership replaced the sensors recently but it's still acting up, provided your original complaint is the same, that work has it's own warranty. So now you really have 2 warranties they can choose from.
It's now considered a "come-back" - they should honor it fine.
If you paid a diagnostic fee before, then you shouldn't have to on a comeback. They obviously mis-diagnosed it."
07-11-2011 10:30 PM
tmart8876 mine keeps coming on as well and i keep getting random misfire on all cyl. replaced plugs, wires, cap and rotor. cleared for about 200 miles and came on again with same code?????????????????????
07-11-2011 09:59 PM
rrich If the dealership replaced the sensors recently but it's still acting up, provided your original complaint is the same, that work has it's own warranty. So now you really have 2 warranties they can choose from.
It's now considered a "come-back" - they should honor it fine.
If you paid a diagnostic fee before, then you shouldn't have to on a comeback. They obviously mis-diagnosed it.

Even if it was a different dealership, it's still covered.

By their own rules, where or how or IF it's licensed has no effect on warranty.
Off road - unless it's broken from direct abuse, doesn't void it.
Tires up to including 35's doesn't void it either.
Skid plates, special suspensions that makes it harder to work on might carry an extra charge above warranty.

If they hassel you, call the District Service Rep. You might even have to go over his head.

I had a heater blend door solenoid go bad at about 3000 miles. The dealer was fixing it under warranty - no problem.

The Arab District Rep came in, saw it had 35's on it and voided it! I went over his head - he was overruled, warranty applied. He was trying to make a name for himself. He did - he's gone.
07-11-2011 07:08 PM
Rubicon2
Quote:
Originally Posted by Cassie2005LJ
My 2005 LJ is throwing error codes for all four 02 sensors (P0032, P0038, P0052, P0058), to include the same 02 sensor (bank 2, sensor 1) that the dealership already replaced a few weeks ago. Truck drives fine. Even the fuel economy seems the same. I'm 99% sure its a bad ECU/PCM, which could be covered by the 8/80 federal emissions warranty...

Here's my problem. Based on prior business I don't trust the dealership to be honest with me about if I qualify for the 8/80. And I don't want to get stuck paying for them to diagnose what I already know. My rig has been lifted, has 36" mudders, and is a registered 'Off-Road Vehicle' in Michigan (even though it's also my daily-driver).

Are the lift/tires/ORV sticker going to disqualify me from the 8/80? Anyone with experience with this, or who know someone who knows someone - your comments would appreciated. If the dealership is going to charge me, I want to know, so I can just do it myself.

thanks!
Ah a fellow Michigander Welcome! The easiest thing to do would be to ask your dealership if they would cover it under that warranty. The worst that can happen is that they will tell you no.
07-11-2011 06:52 PM
Cassie2005LJ My 2005 LJ is throwing error codes for all four 02 sensors (P0032, P0038, P0052, P0058), to include the same 02 sensor (bank 2, sensor 1) that the dealership already replaced a few weeks ago. Truck drives fine. Even the fuel economy seems the same. I'm 99% sure its a bad ECU/PCM, which could be covered by the 8/80 federal emissions warranty...

Here's my problem. Based on prior business I don't trust the dealership to be honest with me about if I qualify for the 8/80. And I don't want to get stuck paying for them to diagnose what I already know. My rig has been lifted, has 36" mudders, and is a registered 'Off-Road Vehicle' in Michigan (even though it's also my daily-driver).

Are the lift/tires/ORV sticker going to disqualify me from the 8/80? Anyone with experience with this, or who know someone who knows someone - your comments would appreciated. If the dealership is going to charge me, I want to know, so I can just do it myself.

thanks!
06-30-2011 04:24 PM
kjeeper10
Quote:
Originally Posted by mr_cowboy1
I just picked up my 06 two days ago and yesterday the check engine light came on. autozone said it was the oxygen sensor on the #2 cylinder. have no idea where or what that means. not a mechanic.
You have 4 sensors 1 before each mini cat
and 1 after. That I believe is bank 1 but you need to know if it's pre cat or after cat. they should have told you something like "bank 1 sensor 2" once you find out the right sensor just google it followed by wrangler forum
Ex:

"help CEL p0432 bank 1 sensor 2, jeep wrangler forum"

Google will bring up a ton of threads dedicated to your problem on this site.

Good luck

Ken
06-30-2011 03:46 PM
mr_cowboy1 I just picked up my 06 two days ago and yesterday the check engine light came on. autozone said it was the oxygen sensor on the #2 cylinder. have no idea where or what that means. not a mechanic.
06-30-2011 08:51 AM
kjeeper10
Quote:
Originally Posted by sandee1818
I just purchased my 06' Wrangler about 3 weeks ago and had the same problem. After driving off the lot and having the Jeep for about 4 days the check engine light came on. When I went to take it back to the dealership to get it looked at the light went off on my way there. Drive around in it for about another week and now the light is back on, went to Auto Zone to get it scanned and it came up as the P-0133 Oxygen Snesor, now I have to take it back the dealership to have them look at it and hope that the light doesn't go off on my way there again... I hope that I don't have to deal with all the same hassel you have and they can figure out the fix for mine. Is this a common problem?

Thanks!
Yes. O2's can be intermittent, the computer does not scan the o2 sensors all the time so if it scans and the 02 is not functioning, you will see the CEL,
Drive a "drive cycle" it scans again, if it's good the the light will shut off. I went through the same bulls**t trying to pass
Emissions. Dealers can easily reset the light therefor it's a good idea to buy a cheap scanner. If the light was reset and you scan it, certain monitors will show "not ready" meaning the system has not run that check. Test for emissions your screwed (to many readiness codes) have to wait for all the monitors to scan

I could have that backwards ready or not ready? I get confused. Somebody will chime in
06-30-2011 08:24 AM
jloesche Most recent update, ... the original shop I went to replaced all remaining sensors, drove it for a couple days with the computer hooked up to it, and all voltage readings were normal. These results indicated the PCM was bad.

I took it to the dealer and they confirmed the PCM was faulty and replaced it under warranty. Apparently even though I am not the original owner, this condition was covered by Jeep. I was super fortunate as this warranty apparently only applies to vehicles with less than 80,000 miles. I had 79,919 when I took it to the dealer! Whew!
06-30-2011 08:08 AM
sandee1818 I just purchased my 06' Wrangler about 3 weeks ago and had the same problem. After driving off the lot and having the Jeep for about 4 days the check engine light came on. When I went to take it back to the dealership to get it looked at the light went off on my way there. Drive around in it for about another week and now the light is back on, went to Auto Zone to get it scanned and it came up as the P-0133 Oxygen Snesor, now I have to take it back the dealership to have them look at it and hope that the light doesn't go off on my way there again... I hope that I don't have to deal with all the same hassel you have and they can figure out the fix for mine. Is this a common problem?

Thanks!
06-29-2011 11:41 PM
kjeeper10 X2 on the sensors ^^^^

Quote:
Originally Posted by kjeeper10
What brand sensors were put in, jeeps are picky
06-29-2011 10:50 PM
Shelby427 Have to agree with colorubi/rrich/kjeeper10. You have a rich signal. It sounds more like the techs aren't looking deep enough into the problem and trying to fix the side effects instead of the actual cause.

Two replaced sensors in the same spot pretty much eliminates them as the fault.
You've got something else causing them to set the code.

Like said It sounds more like a fuel related problem that's giving you a light.
Something else, pull the plugs and take a look at them, they are the indicators of internal problems, like running rich. Heck a fouled plug by itself could give you a rich reading.
And Jeeps don't seem to like Bosch O2 sensors.
06-29-2011 10:24 PM
kjeeper10
Quote:
Originally Posted by Redhot
Although I have no advice to give, I'm interested to hear how this turns out. I bought my 2006 Jeep Wrangler Unlimited last Saturday and am having the same code show up. The only thing I notice is a gas smell coming from the back of the Jeep. I made sure to click the gas cap several extra clicks, but still the check engine light comes back on. And funny, the light wasn't on when I left the car lot with it, but came on about 100 miles down the road. I hope yours gets figured out soon and without any more cost to you!
Ur def running rich. Check for vacuum leaks. I was dealing with 02 codes. I had a large vacuum leak (manifold gasket) had fixed and was good for a month. Finally replaced all the 02's with NGK and been good since
my jeep has 159,000.
06-29-2011 02:47 PM
Redhot Although I have no advice to give, I'm interested to hear how this turns out. I bought my 2006 Jeep Wrangler Unlimited last Saturday and am having the same code show up. The only thing I notice is a gas smell coming from the back of the Jeep. I made sure to click the gas cap several extra clicks, but still the check engine light comes back on. And funny, the light wasn't on when I left the car lot with it, but came on about 100 miles down the road. I hope yours gets figured out soon and without any more cost to you!
06-17-2011 02:05 PM
rrich The O2 heater circuit is always on, no matter what the outside temp is. The exhaust temp is waaay hotter than 100 degree weather. The front o2 is where it is, is at least 200 degrees, the rear "sees" more like 350 degrees. If the weather was that hot, you'd die!
Humidity has no effect on the sensor, just you.

The heater's are put on the sensors to help them warm up faster so they can work earlier during cold warm-up, but they are always on whenever the ignition switch is on.

The CE light is telling you the sensor is "seeing" a rich condition. Rich condition - either too much fuel or not enough air = rich. Or it's defective.

Switch the sensor to the other banck - see if sets the code over there. If it moved you moved the problem (the sensor.) If it doesn't and it's not too rich (check CO with an exhaust analyzer) check the wiring.

If it likes sitting in the shade by a lake, maybe it will like water skiing! Maybe even a trip to the zoo?
06-17-2011 02:05 PM
kjeeper10 What brand sensors were put in, jeeps are picky
06-17-2011 01:36 PM
jloesche An update to all this, ... the "Check Engine" light was not on when I left work yesterday afternoon. Thinking about this while cruising home with the top down, sweating in the Houston heat and humidity, ... I realized that the sensor heaters are probably not needed or activated with the Jeep sitting where it doesn't have a chance to cool off. The Jeep was sitting in near full sun, 100 F temps most of the day yesterday, with the exception of when I left early in the morning and last night while sitting in the shade by a lake. The "Check Engine" light appears to come on when the heater is called for and the Jeep is below a certain temperature.

Running this idea past the master mechanic/technician, he agreed that could be the problem. So, now we have to find out if it's actually the Bank 2, Sensor 1 sensor heater or in the wiring harness for the sensors.
06-16-2011 11:03 AM
colorubi P0152 is a high voltage signal on the upstream (sensor 1), bank 2 (rear cylinders).
The high voltage indicates a rich fuel reading. The voltage is likely well above the .45 V range. I would use an OBDII with live data streaming and see what the fuel trims are showing, comparing the front to rear sensor difference. Check the wiring harness & connector carefully on that sensor. Look for a troublesome injector on the rear 3 cylinders. One of them may be leaking at the tip. See if your fuel rail pressure drops quickly after the engine is shut off. You need someone to get a GOOD diagnosis before you do anything else.
06-16-2011 10:08 AM
jloesche
Check Engine Light - Emissions

I bought my 2006 Jeep Wrangler Unlimited a month ago outside Chicago and drove it down to Houston without any issues. While going to get the Jeep inspected so I could get a Texas title and registration, the "Check Engine" light came in.

The code was P-0152. The Bank 2, Sensor 1 Oxygen Sensor was replaced based upon what the shop said. About 10 miles later, the "Check Engine" light came on again.

I went to AutoZone to have the code read, and it was the same P-0152. I took it back to the shop, and they read P-0457 (Gas Cap), then reset it. About another 10 miles later, "Check Engine" light came back on.

Back to the shop I go, ... they replaced the O2 Sensor they installed thinking it was faulty. The Jeep made it about 70 miles before the "Check Engine" light came on yet again.

Back to the shop, ... they read the same code again, P-0152. This time they are thinking the downstream sensor may be the issue. After they removed it, they hooked up a pressure probe to the exhaust and found the pressure was quite off. Catalytic converter was replaced. It looked like the Chicago winters and salty roads might have had a hand it on it's demise.

The Jeep made it about another 70 miles. Yep, ... the "Check Engine" light came on again. The downstream sensor was replaced.

About 2 miles later, the "Check Engine" light came on. I decided to drive the Jeep to work (70 miles round trip) so that I could drop it off at the shop on the way home. About 5-10 miles from the shop, the "Check Engine" light cleared. So, I went home instead.

Wondering why that happened, I decided to take the Jeep back to work again the next day. I did not even make it out of the subdivision before the "Check Engine" light came on. And on the drive home, it did not clear this time. So, I took it to the shop. They read P-0152 again, but then it cleared by itself while they were looking at it.

I left it with them so they could do a "cold start" in the morning. They replaced all remaining O2 sensors (at their cost since this is also kicking their butt). I took the Jeep home last night, and decided to test it all again this morning. I didn't even make it out of my driveway before the bloody "Check Engine" light came back on.

Has anyone had any issues like this on their Jeep?

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