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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 514 (Engine Controls/Fuel - Hybrid (LZ1) - DTC P0351 To DTC P3449 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2227 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
  1. Engine idling, move the related harnesses/connectors at the BARO sensor and at the ECM while observing the scan tool BARO sensor parameter. The scan tool BARO parameter should be steady.
    • If the parameter does not perform as specified, repair the harness/connectors as necessary.
  2. If all circuits test normal, test or replace the BARO sensor.
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