Need fix for P0139 CEL code on '04 WRX
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This is a discussion on Need fix for P0139 CEL code on '04 WRX within the Tuning: Electronic Engine Management forums, part of the Tech & Modifying & General Repairs category; I am getting a P0139 CEL code and need HELP! Please...... Does the 1Mohm resistor across the rear O2 sensor ...

  1. #1
    Registered User
    Join Date
    Sep 2003

    Need fix for P0139 CEL code on '04 WRX

    I am getting a P0139 CEL code and need HELP! Please......

    Does the 1Mohm resistor across the rear O2 sensor by itself help.

    I was wondering if you have pics, sketch, drawing, etc. on how to do the CEL fix with the 1Mohm resistor on the O2 sensor or could describe it in more detail on how to do it. I'm a bit of a newbie and could use all the instruction I could get.

    I got the CEL on my '04 WRX after installing a Scoobysport downpipe w/CEL fix and an STI uppipe w/CEL fix along with a neutron axle back exhaust, 3/16 mod and lastly a GP Moto elbow and K&N filter replacing the silencer box and stock elbow completely.

    Thanks much for any help you could give me.


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  3. #2
    Raz is offline
    Registered User
    Join Date
    Aug 2003

    You've got a PM.

  4. #3
    God is offline
    Registered User God's Avatar
    Join Date
    Aug 2001
    Detroit, MI
    Actually its just not grounding properly. Tighten down the sensor and reset.
    Daniel Ponze, Lead Tuner Tuning Factory, Inc.
    PH: (248) 477-0700___FX: (248) 477-0701

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  6. #4
    Registered User
    Join Date
    Jul 2004
    the sensor isnt grounding properly? I have been having the same problem throwing the P0139 code and all i have it a catback...what should i check?

  7. #5
    Registered User aspitfire's Avatar
    Join Date
    Apr 2004
    I also got this code when i installed my TBE, it comes and goes, it went off for a while then came on all of a sudden again when i had to slam on my breaks and my abs kicked in.
    '04 WRX
    PM me about Porting and Polishing!

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