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o2 sensor cel

Discussion in 'General Tech and Maintenance' started by sixxwise, Oct 4, 2006.

  1. sixxwise

    sixxwise Junior Member

    Likes Received:
    Jun 4, 2006
    My CEL is on .. I get the following codes..

    P0141 O2 Sensor Heater Circuit (Bank 1, Sensor 2)
    P0135 O2 Sensor Heater Circuit (Bank 1, Sensor 1)

    My pre-cat o2 sensor was replaced and I am still getting the same codes. I assumed that replacing the pre-cat sensor get rid of the sensor 1 code but it didn't.
    So now my question is.. If one of the o2 sensors fails will that cause the ecu to give codes for both?

    If not then I must have a wiring problem :(
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