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Engine Control System - 5.3L - DTC P0451 to P1381: Other GMC Envoy II

Testing & Diagnostics ~142 words

Action Taken When DTCs P0601, P0602, P0603, P0604, P0606, P060E, and P1621 Set

  1. The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
  2. The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.

Conditions for Clearing the MIL/DTCs P0601, P0602, P0603, P0604, P0606, P0607, P1621, and P2610

  1. The control module turns OFF the MIL after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
  2. A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
  3. A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
  4. Clear the MIL and the DTC with a scan tool.

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