B144A Code: Meaning, Causes, and Symptoms | OBD2 Codes

B144A – Run Power Relay Circuit

 

B144A Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B144A Possible Causes

 

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

 

B144A Description

 

The Body Control Module (BCM) controls the trailer ignition power relay through the control circuit by applying voltage to the run relay coil control circuit. The trailer ignition power relay is energized when the ignition is in the ON position.