C1257 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C1257 – Power Supply Drive Circuit
C1257 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C1257 Possible Causes
Faulty Brake Booster Pump Assembly,Brake Booster Pump Assembly harness is open or shorted,Brake Booster Pump Assembly circuit poor electrical connection,Faulty Master Cylinder Solenoid (Skid Control ECU)
C1257 Description
The Master Cylinder Solenoid (Skid Control ECU) monitors the Brake Booster Pump Assembly. The Master Cylinder Solenoid (Skid Control ECU) sets the OBDII code when the Brake Booster Pump Assembly is not to factory specifications.