B131A Code: Meaning, Causes, and Symptoms | OBD2 Codes

B131A – Delayed Accessory Power Circuit Short


B131A Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


B131A Possible Causes


Faulty Accessory Delay Relay,Accessory Delay Relay harness is open or shorted,Accessory Delay Relay circuit poor electrical connection,Faulty Body Control Module (BCM)


B131A Description


The Accessory Delay Relay is located in the Body Control Module (BCM). When the ignition is turned ON, the BCM activates the accessory delay relay by grounding the relay coil. When the ignition is turned to the OFF position, the BCM continues to ground the accessory delay relay coil for approximately 10 minutes, or until a front door is opened. When the accessory delay relay is active, it supplies voltage to the power window system. The OBDII sets when the BCM senses an open, short to voltage or short to ground on the accessory delay relay control circuit.