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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 222 (Hybrid Engine Control System) >> Diagnostic Information and Procedures >> DTC P1B0D or P1B0E >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect for transmission control module (TCM) DTC P0723, any other DTCs that would indicate an internal transmission mechanical concern or any vehicle communication U-code DTCs.
  2. Clear the DTC information.
  3. Turn the ignition OFF for 1 minute.
    4. IMPORTANT: DTC P1B0E may be the result of driving conditions or habits.
  4. Operate the vehicle under the conditions for running.
  5. Retest for DTCs P1B0D and P1B0E.
    • If the DTC resets, program the PIM with the latest software version and recheck for DTCs. If the DTC resets after programming or if the PIM already contains the latest software version, replace the PIM.
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