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Home › Hummer › 2009 › H3 Alpha › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 5.3L - DTC P0315 To DTC P064A › DTC P1255 or P064A › Circuit/System Testing

Circuit/System Testing

  1. Verify that DTC P0231, P0232 or P023F are not set as current or history.
  2. Ensure that the entire undercarriage of the vehicle is clean, especially around the area where the FPCM is located. Clear all codes from the FPCM and test drive the vehicle. Verify that DTC P1255 or P064A do not set as current.
    • If DTC P1255 or P064A reset as current, replace the FPCM.
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