B153B Code: Meaning, Causes, and Symptoms | OBD2 Codes

B153B – Liftgate Open Switch Signal Circuit

 

B153B Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B153B Possible Causes

 

Faulty Liftgate Motor Assembly,Liftgate Motor Assembly harness is open or shorted,Liftgate Motor Assembly circuit poor electrical connection,Faulty Liftgate Control Module (LGM)

 

B153B Description

 

The full open switch is part of the gear motor assembly and will close and become active when the liftgate reaches the full open position. The full open switch signal circuit is supplied battery voltage through a resistor and monitored within the Liftgate Control Module (LGM). The Liftgate Control Module provides a low reference circuit and when the switch contacts close, the signal circuit goes low and the LGM determines the switch to be active.