B1587 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B1587 – Autolamp Delay Increase Circuit Failure
B1587 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B1587 Possible Causes
Faulty Autolamp Delay,Autolamp Delay harness is open or shorted,Autolamp Delay circuit poor electrical connection,Faulty Body Control Module (BCM)
The Body Control Module (BCM) monitors the Autolamp Delay. The BCM sets the OBDII code when the Autolamp Delay is not to factory specifications.