Diagnostic Aids
WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
- If the DTC B3127 is a history DTC, the fault may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
- The following conditions may cause an intermittent malfunction to occur:
- An intermittent short to ground in the driver door lock actuator unlock control circuit
- The driver door lock actuator is shorted to ground internally.
- The BCM is shorted to ground internally.
If the DTC B3127 is accompanied by DTC B3267, the fault may be an open or shorted battery positive voltage circuit, or an open RFA BATT fuse. Refer to Circuit Testing in Wiring Systems.