B166B Code: Meaning, Causes, and Symptoms | OBD2 Codes
B166B – Left Trailer Tow Lamp Control Circuit Low
B166B Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B166B Possible Causes
Faulty Left Trailer Tow Lamp Bulb,Left Trailer Tow Lamp Bulb harness is open or shorted,Left Trailer Tow Lamp Bulb circuit poor electrical connection,Faulty Totally Integrated Power Module (TIPM)
B166B Description
The Totally Integrated Power Module (TIPM) monitors the Left Trailer Tow Lamp Control. The TIPM sets the OBDII code when the Left Trailer Tow Lamp Control is not to factory specifications.