2009 Buick Enclave AWD V6-3.6L Diagnostic Trouble Code (DTC) Manual

Diagnostic Procedure

This manual provides instructions for diagnosing and repairing issues related to the 5-volt reference circuit in the 2009 Buick Enclave AWD V6-3.6L.

The manual covers the following topics:

DTC descriptions and diagnostic instructions

Circuit/system description and testing

Conditions for running and setting the DTC

Action taken when the DTC sets

Conditions for clearing the DTC

Diagnostic aids and reference information

DTC Descriptors

The manual covers the following DTCs: P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699.

Each DTC descriptor provides information on the 5-volt reference circuit voltage and the affected components.

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Diagnostic Procedure