C1402 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C1402 – Front Speed Sensor Left Malfunction
C1402 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C1402 Possible Causes
Faulty Front Speed Sensor Left,Front Speed Sensor Left Rotor,Front Speed Sensor Left harness is open or shorted,Front Speed Sensor Left circuit poor electrical connection
The speed sensor detects the wheel speed and sends the appropriate signals to the Skid Control ECU. These signals are used for brake control. The speed sensor rotors have rows of alternating N and S magnetic poles and their magnetic fields change when the rotors turn. Each speed sensor detects that magnetic change and sends a pulse signal to the Skid Control ECU.