C123A Code: Meaning, Causes, and Symptoms | OBD2 Codes
C123A – ESP System Sensor Calibration
C123A Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C123A Possible Causes
Faulty Dynamic Sensor,Dynamic Sensor harness is open or shorted,Dynamic Sensor circuit poor electrical connection,Faulty Anti-Lock Brake System (ABS) Module
The Anti-Lock Brake System (ABS) Module monitors the Electronic Stability Program (ESP) Dynamic Sensor. The ABS Module sets the OBDII code when the Dynamic Sensor is not to factory specifications.