C12B9 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C12B9 – ABS Regenerative Axle Pressure Sensor Circuit Open Or Short To Ground
C12B9 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C12B9 Possible Causes
Faulty Brake Pressure Modulator,Brake Pressure Modulator harness is open or shorted,Brake Pressure Modulator circuit poor electrical connection
The Electronic Brake Control Module (EBCM) uses input from the regenerative axle pressure sensor for more accurate control during a brake and vehicle stability enhancement system event. The regenerative axle pressure sensor is internal to the brake pressure modulator.