B1521 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1521 – Hood Switch Circuit Short To Battery

 

B1521 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B1521 Possible Causes

 

Faulty Hood Switch,Hood Switch harness is open or shorted,Hood Switch circuit poor electrical connection,Faulty Body Control Module (BCM)

 

B1521 Description

 

The Body Control Module (BCM) monitors the Hood Switch. The BCM sets the OBDII code when the Hood Switch is not to factory specifications.