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Unread 01-10-2010, 02:59 PM   #1
jcspencer01
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2001 TJ Wrangler 
 
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error code P0135

I am getting this code and was wondering if anyone has any suggestions.
I have a 2001 TJ, 6, manual.. I replaced two o2 sensors this past summer using part number 13664 and 13687 from orielly.

I checked the fuses and they are all ok. are the upstream o2 and downstream o2 the same parts?

thanks

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Unread 01-10-2010, 04:54 PM   #2
cj847
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OBD-II Trouble Code: P0135 Oxygen O2 Sensor Heater Circuit Malfunction (Bank1, Sensor1)
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Unread 01-10-2010, 05:50 PM   #3
jcspencer01
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Thanks for the link.. So which one is that?
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Unread 01-10-2010, 07:41 PM   #4
cj847
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Usually bank one is the left bank (or front in the case of an in line 6 with 2 sensors {my 97 only has one sensor}). Sensor 1 is the one in the exhaust manifold. Sensor 2 is the one behind the cat.
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Unread 01-10-2010, 07:56 PM   #5
loaderopp
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I had the same issues, i traced all the leads, i did an ohms reading on the scensor, bank 1 sensor 1 is the front manifold first scensor.

i replaced the sensor, 4 time 2 after market 2 OEM same thing kept getting P0135, changed the relay, checked the fuses, again checked all the wires, So i threw in the towel and took it to the dealer, they changed the sensor again, and again got the same code, to they hooked up the computer to my system. and found my computer is throwing a false reading/test. they are replacing the Computer on warranty.
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Unread 01-10-2010, 08:26 PM   #6
jcspencer01
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i have 4 sensors and replaced the two front this summer but dont understand if front and rear are different.
dirtsquirt- that luck sounds like mine. but I am way out of warranty..
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Unread 01-10-2010, 09:24 PM   #7
loaderopp
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yes you have 4 sensor 1 bank 1, sensor2 bank 1, sensor1 bank2 and sensor2 bank 2 and yes they are different part numbers ( lead lenght ) is the only Differance

the code p0135 your getting are, O2 heater circuit malfunction sensor 1 bank 1.
check the 20 amp fuse in the master power dist, box under the hood, and check the OSD relay. if you have not done so.
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Unread 09-22-2011, 10:32 AM   #8
mikey600900
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I have the same issue, has anyone found a solution?

loaderopp: you said that you were having a new Comp put in, did that end up fixing this issue?
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Unread 09-22-2011, 10:48 PM   #9
loaderopp
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Quote:
Originally Posted by mikey600900 View Post
I have the same issue, has anyone found a solution?

loaderopp: you said that you were having a new Comp put in, did that end up fixing this issue?
The computer was changed under warranty, and i was still having the problem with P0135. But i did find what the problem was. ETHONAL gas. any time i use it i get a P0135 code. i have watched this issue and noticed, every time i used Ethonal gas i would get the check engine and same code.

I have not used any enthonal gas now for months and have not had the code popup once.
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Unread 09-22-2011, 11:12 PM   #10
Yucca-man
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loaderopp - What mixture do you consider "ethanol gas" because it's always mixed in the fuel here in Colorado, or you have 0% ethanol fuel available in Alberta? We're at 5% or 10% normally, I can't recall which off the top of my head. Granted, that's a lot lower than the E85 (85% Ethanol) stuff, but it still contains it - so maybe that's not the actual source of the problems you were seeing?
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Unread 09-23-2011, 03:14 AM   #11
oakmckinley
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I thought the upstream ones were heated? Not just a diff in length?

I am so glad I don't have calif. emmisions
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Unread 09-23-2011, 05:12 AM   #12
TheBucks
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One other thing to check. I found the wire harness that went to the front O2 sensor wasn't secured anymore & ended up against the manifold & melted the wires
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Unread 09-23-2011, 08:33 PM   #13
loaderopp
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Quote:
Originally Posted by Yucca-man View Post
loaderopp - What mixture do you consider "ethanol gas" because it's always mixed in the fuel here in Colorado, or you have 0% ethanol fuel available in Alberta? We're at 5% or 10% normally, I can't recall which off the top of my head. Granted, that's a lot lower than the E85 (85% Ethanol) stuff, but it still contains it - so maybe that's not the actual source of the problems you were seeing?
Here reg gas =10% mid = 5% prem =0 i run prem only now no problems.
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