B2381 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B2381 – Heater Coolant Temperature Sensor Circuit Open
B2381 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B2381 Possible Causes
Faulty Heater Coolant Temperature Sensor,Heater Coolant Temperature Sensor harness is open or shorted,Heater Coolant Temperature Sensor circuit poor electrical connection,Faulty Body Control Module (BCM)
B2381 Description
The Body Control Module (BCM) monitors the Heater Coolant Temperature Sensor. The BCM sets the OBDII code when the Heater Coolant Temperature Sensor is not to factory specifications.