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-   -   P0135 (http://www.jeepgarage.org/f203/p0135-5335.html)

adesisto 01-06-2010 08:31 AM

P0135
 
Hi all,

I have a 2003 Jeep Grand Cherokee Laredo inline 4.0L straight six with 77k on it. I decided to replace the O2 sensors prior to the cat in an attempt to get better fuel mileage. A day or sa after I had installed the new O2 sensors I got a check engine light. My scanner told me that the heater curcuit was not working for the O2 sensor in bank 1 sensor 1 position. I checked fuses and wiring to the sensor and did not find anything. I then proceeded to erase the code, thinking that it was an error, and then a day or so latter it came back. I then suspected that the O2 sensor I had purchased was bad so I swaped it for a new one. After installing the new on the check engine light went out on it's own. Then a day or so later it came back. I'm stumped, could 2 brand new O2 sensors be bad? Any advice would be greatly appciated. Thank you for taking the time to read this post.

Frankie 01-06-2010 08:38 AM

Re: P0135
 
What kind did you replace it with...OEM or Bosch?

Also, Your P0135 refers to the sensor on the engine side of the the cat closest to the radiator...Are you sure you changed the correct one?

QBNKID 01-06-2010 08:52 AM

Re: P0135
 
Quote:

Originally Posted by adesisto (Post 126655)
Hi all,

I have a 2003 Jeep Grand Cherokee Laredo inline 4.0L straight six with 77k on it. I decided to replace the O2 sensors prior to the cat in an attempt to get better fuel mileage. A day or sa after I had installed the new O2 sensors I got a check engine light. My scanner told me that the heater curcuit was not working for the O2 sensor in bank 1 sensor 1 position. I checked fuses and wiring to the sensor and did not find anything. I then proceeded to erase the code, thinking that it was an error, and then a day or so latter it came back. I then suspected that the O2 sensor I had purchased was bad so I swaped it for a new one. After installing the new on the check engine light went out on it's own. Then a day or so later it came back. I'm stumped, could 2 brand new O2 sensors be bad? Any advice would be greatly appciated. Thank you for taking the time to read this post.

Like Frankie said, make sure you replace it with an OEM sensor, do not change with any other brand. Check the plug and wires. I had a similar problem once on another jeep and it turned out to be the plug/wires.
Good luck and please come back when you fix it so we all know for sure what was the cause and fix, it might help others in the future.

adesisto 01-06-2010 09:07 AM

Re: P0135
 
I used a Bosch O2 sensor? Could that be the problem?

Chaoul1 01-06-2010 09:10 AM

Re: P0135
 
Yes, see if you could still return it and get an OEM one or you could see more problems down the road.

QBNKID 01-06-2010 09:23 AM

Re: P0135
 
Quote:

Originally Posted by adesisto (Post 126676)
I used a Bosch O2 sensor? Could that be the problem?

Yes, pretty sure that's it. I would change any sensor on a jeep with OEM only. We have a vendor here justforjeeps.com, you might be able to order it from them and get the forum discount and shipping usually is very cheap and fast. If you call or contact them ask for Peter and tell him to get you the jeepgarage discount.
Good luck!

adesisto 01-06-2010 09:39 AM

Re: P0135
 
Quote:

Originally Posted by QBNKID (Post 126690)
Yes, pretty sure that's it. I would change any sensor on a jeep with OEM only. We have a vendor here justforjeeps.com, you might be able to order it from them and get the forum discount and shipping usually is very cheap and fast. If you call or contact them ask for Peter and tell him to get you the jeepgarage discount.
Good luck!

Thank you!!!

jon022191 01-06-2010 08:19 PM

Re: P0135
 
ive replaced 2 of my cats on my 4.7 and all 4 o2 sensors with bosch and they work great, maybe they didnt give you a heated o2, maybe just a regular o2, parts stores arent the greatest at detail...just an idea

Unholyskorn86 01-06-2010 08:27 PM

Re: P0135
 
Yeah I find it hard to believe bosch makes parts that dont work. Human error my friend, every time...

Tim@NCTSLLC 01-07-2010 01:29 PM

Re: P0135
 
I have not had any problem with using the Bosch sensors, recently replaced both of mine in my 08 Cherokee although I did have to switch the plastic connector as the sensor I used was for an 06 cherokee which used a different connector (same sensor).

The OEM sensors (I know know once I removed them) are manufactured by NGK, and they are their "NTK" brand of oxygen sensor.

I suspect you may not have gotten the correct sensor. Parts store may have given you the wrong year or possibly a downstream instead of an upstream sensor. They are not the same.

I would have used OEM, but I needed it right now, so I went with the Bosch as it was in stock. By the way they don't list a part number for 07 and 08 yet as a replacement (Bosch).

Motomex 11-20-2010 07:37 AM

Re: P0135
 
I had the very same story as the first poster did in my '03 Grand with a 4.0L. I finally had to replace the Bosch O2 sensor (after changing it 2 times also!) with an OE sensor. That did the trick!
Should have listened to the Jeep parts guy when he told me that sometimes the jeep computers are finicky towards anything but OE sensors!
Anyway, thanks for the information as it was this thread that lead me to re-think my sensor problem and finally get it solved.

Tony


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