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Thread: Help please

  1. #1
    Potential Tuner
    Join Date
    Jun 2008
    Location
    san diego, ca
    Posts
    5

    Help please

    I have been trying to figure this out for awhile now and am lost its a pride thing now lol so i have reset these codes and replaced the sensor 3 times and still they pop up any ideas what is causing them? This is on an 2008 HHR SS

    [] P0135 - HO2S Heater Performance Bank 1 Sensor 1 (Immature)
    [] P2251 - O2 Sensor Reference Ground Circuit/Open Bank 1 Sensor 1 (SES) (History) (Immature)
    [] P0130 - HO2S Circuit Closed Loop (CL) Performance Bank 1 Sensor 1 (SES) (Old) (History) (Current) (Immature)
    [] P0130 - HO2S Circuit Closed Loop (CL) Performance Bank 1 Sensor 1
    [] P2251 - O2 Sensor Reference Ground Circuit/Open Bank 1 Sensor 1

  2. #2
    Senior Tuner
    Join Date
    Dec 2009
    Posts
    1,088
    If you have replaced the sensor then I would think you have a open ckt in harness.

    Pcm is missing the Ground and reference. Check harness make sure not cut, make sure the correct sensor installed and correctly plugged in.

  3. #3
    Potential Tuner
    Join Date
    Jun 2008
    Location
    san diego, ca
    Posts
    5
    Quote Originally Posted by planethax View Post
    If you have replaced the sensor then I would think you have a open ckt in harness.

    Pcm is missing the Ground and reference. Check harness make sure not cut, make sure the correct sensor installed and correctly plugged in.
    I will check the harness but i dont know how it would have gotten damaged, the connection is fine.