Diagnostic Aids
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
- If the DTC B2645 is a history DTC, the fault may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
- An intermittent short to battery positive voltage in the following locations may cause an intermittent malfunction to occur:
- The ambient light sensor reference voltage circuit
- The ambient light sensor
- The body control module (BCM)