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H2 4D Utility Pickup
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DTC P0521 (5.3 L Engine)
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Action Taken When the DTC Sets (5.3 L Engine)
Action Taken When the DTC Sets (5.3 L Engine)
The ECM records the operating conditions at the time the diagnostics test fails. The ECM displays this information in the Failure Records on the scan tool.
The IPC illuminates the EOP indicator.