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Home >> Cadillac >> 2013 >> Escalade Hybrid, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls/Fuel - 5.3L, 6.0L, 6.2L - DTC P0442 To DTC P3449 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2270 or P2272 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition ON, observe the DTC information with a scan tool. Verify that no HO2S heater DTCs are set.
  2. Engine running, observe the appropriate scan tool HO2S Bank 1 or 2 Sensor 1 or 2 voltage parameter. The reading should be within the range of 50-1,050 mV.
  3. Move the related wiring and connectors while observing the HO2S Heater parameter with a scan tool. The parameter should not change with movement.
    • If movement affects the parameter, repair the appropriate harness or connector.
  4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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