cels p0171 p0037
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This is a discussion on cels p0171 p0037 within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; P0037 Rear oxygen sensor heater circuit malfunction P0171 Fuel trim malfunction (A/F too lean) I'm throwing both of these cels. ...

  1. #1
    Registered User spencerxi's Avatar
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    cels p0171 p0037

    P0037 Rear oxygen sensor heater circuit malfunction
    P0171 Fuel trim malfunction (A/F too lean)

    I'm throwing both of these cels. Ijust did a clutch change this week. Anyone have any idea what this combonaation meens?

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  3. #2
    Administrator Trainrex's Avatar
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    Quote Originally Posted by spencerxi
    P0037 Rear oxygen sensor heater circuit malfunction
    P0171 Fuel trim malfunction (A/F too lean)

    I'm throwing both of these cels. Ijust did a clutch change this week. Anyone have any idea what this combonaation meens?
    Check if the ground strap is unbolted.

  4. #3
    Registered User spencerxi's Avatar
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    The car has a reall rough idle also. I found an exhuast leak at the muffler and the mid pipe. I have Cobb TBE This that could throw those cels. I'm going to check the ground strap

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    I am also throwing code 0037.....I am curious as well as to what to do to fix this...

  6. #5
    Registered User spencerxi's Avatar
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    well I a new gasket on the mid pipe to the muffler and pullled the intercooler of and re did all the hoses. I think the main hoses from the turbo was not on all the way. Now I reset the esu and the cels havent come back.

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