C15B4 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C15B4 – Steering Control ECU Malfunction
C15B4 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C15B4 Possible Causes
Faulty Steering Control ECU,Steering Control ECU harness is open or shorted,Steering Control ECU circuit poor electrical connection
If the steering control ECU detects an internal malfunction, it will turn the master warning light on, store the Diagnostic Trouble Code (DTC), and stop the Variable Gear Ratio Steering (VGRS) operation.