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  1. #1
    Senior TEAM Member
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    Apr 2005
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    San Jose, CA
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    Post How to fix p0135 engine code

    Many people tend to get this P0135 Code.

    What does that mean?

    This code refers to the front oxygen sensor on Bank 1. The heated circuit in the oxygen sensor decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0135.

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    Symptoms

    You will likely notice poor fuel economy the illumination of the MIL.
    Causes

    A code P0135 may mean that one or more of the following has happened:

    * O2 Heater element resistance is high
    * Internal short or open in the heater element
    * O2 heater circuit wiring high resistance
    * open or short to ground in the wiring harness

    Possible Solutions

    * Repair short or open or high resistance in wiring harness or harness connectors
    * Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)
    http://www.obd-codes.com/p0135



    I wanted to start a thread with possible fixes and things to check if you encounter this problem. Some people have actually had problems with the wires rubbing, so please post pictures of that if anyone here has a picture of it.

    Here is a believe to why my p0135 keeps coming on and off. I've ordered a new o2 anyways.



    So anyways, my p0135 would come on from time to time and run really crappy. So i pulled my o2 out and sprayed it with some electrical cleaner, then I checked my #18 fuse and it was still good. But i noticed some corrision forming on the contacts.
    -So I used a really small screw driver to push the connectors closer together and sprayed some electrical cleaner on the contacts, then i took the small screw driver and rubbed the contacts.
    -After that i took the fuse and pliers then pulled the fuse in a out of the slot a few times to clean it thoroughly.

    The CEL is now gone!

    Last edited by 247_racing_zx3; May 27, 2009 at 3:06 PM. Reason: title
    Garage as of 5/19/14
    2003 Focus ZX3 Turbo 2.3L
    2003 Focus ZTW
    2003 Honda Civic Hybrid

  2. #2
    Premier Sponsor
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    Aug 2000
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    24,330

    Default Re: How to fix p0135 engine code

    Nice going if it stays off.

  3. #3
    TEAM Member
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    Nov 2008
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    Norristown, Pa
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    161

    Default Re: How to fix p0135 engine code

    Nice, Im going to pull mine tonight, clean it off and check the connections.. Then Ill order a new o2
    04 SVTF Daily Driver
    96 Cobra Built and Blown 536RWHP/465RWTQ

  4. #4
    Senior TEAM Member
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    Apr 2005
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    Default Re: How to fix p0135 engine code

    My p0135 CEL hasn't come back yet, But I installed a new o2 sensor about a week ago anyways. I'm at 45k miles
    Garage as of 5/19/14
    2003 Focus ZX3 Turbo 2.3L
    2003 Focus ZTW
    2003 Honda Civic Hybrid

  5. #5
    Rookie
    Join Date
    Jul 2009
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    45

    Default Re: How to fix p0135 engine code

    my fuse also keeps blowing could the back o2 sensor blow the fuse I had the same code just placed mine yesterday and still blows

  6. #6
    Rookie
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    Mar 2006
    Location
    OKC, OK
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    8

    Default Re: How to fix p0135 engine code

    I'm getting this code. Checked my fuse and it was blown. Replaced it and cleared my CELs. Drove it around a bit. Stopped and turned it off and back on a couple times too. No CEL as of yet.

    I'll keep an eye on it and update later.
    14.9 @ 94.07 (2.228 60ft.) No, I'm not stock.[thumb]

    "I feel lethal."

  7. #7
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    Mar 2006
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    OKC, OK
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    Default Re: How to fix p0135 engine code

    p0135 code is still gone but I did get the p0133 again. I had it before though. That'll
    be my next project.
    14.9 @ 94.07 (2.228 60ft.) No, I'm not stock.[thumb]

    "I feel lethal."

  8. #8
    Senior TEAM Member
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    Apr 2005
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    Default Re: How to fix p0135 engine code

    Glad to hear it helped someone!
    Garage as of 5/19/14
    2003 Focus ZX3 Turbo 2.3L
    2003 Focus ZTW
    2003 Honda Civic Hybrid

  9. #9
    TEAM Member
    Join Date
    Oct 2009
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    516

    Default Re: How to fix p0135 engine code

    having the same problem right now...

    Can you help?

    http://forums.focaljet.com/team-tech...lp-please.html
    WTB 67mm SVT TB
    Please PM me..

  10. #10
    Rookie
    Join Date
    Mar 2011
    Posts
    27

    Default Re: How to fix p0135 engine code

    I'm having a problem with this too I hijacked someone else's thread with some suggestions but I have yet to solve the issue.

    I replaced the o2 sensor, cleared the code, put in a new fuse and it just blows the fuse every time.
    I put in a new fuse and instantly when i turn the key the fuse blows.

    I have checked wiring (nothing obvious)
    I have tried unplugging the sensor clearing the code replacing the fuse, when I turn the key the fuse instantly blows. I'm pretty sure its a wiring issue.
    Is there a common spot for wires to be worn at?
    I thought about adding Dielectric grease but thought that would worsen the shorts
    I also got tired of dropping my cat to change the o2 so I had it relocated to the side but this I dont think this has anything to do with an electrical short

  11. #11
    TEAM Member
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    Dec 2001
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    SE Michigan
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    Default Re: How to fix p0135 engine code

    With the fuse blowing immediately (as opposed to intermittently) it actually makes locating the probable wire short much easier.

    1) Disconnect the HEGO sensor.

    2) Remove the fuse that is blowing and place a 12V test lamp (or a buzzer if you have one) across the terminals in its place

    3) Turn the key on

    If the circuit is shorted to ground, the test lamp will now be lit, and it will also protect the wiring from damage. You can now wiggle test the harness (just a small section at a time is recommnded) until the test lamp goes out. As soon as the lamp goes out you've found the area of the short.

  12. #12
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    Mar 2011
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    27

    Default Re: How to fix p0135 engine code

    thanks man. I'm assuming the HEGO is the front o2 sensor.


 

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