Diagnostic Aids

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

If the DTC B2553 is a history DTC, the fault may be intermittent. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS in Wiring Systems.
The following conditions may cause an intermittent malfunction to occur:
- An intermittent short to battery in backup lamp relay control circuit.
- The backup lamp relay coil is intermittently shorted to the battery.
- The BCM is intermittently shorted to the battery.