C0221 Code: Meaning, Causes, and Symptoms | OBD2 Codes

C0221 – Right Front Speed Sensor or Circuit Open

 

C0221 Possible Symptoms

 

Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)

 

C0221 Possible Causes

 

Faulty Right Front Speed Sensor,Right Front Speed Sensor harness is open or shorted,Right Front Speed Sensor circuit poor electrical connection,Faulty EBCM

 

C0221 Description

 

As the wheel spins, the wheel speed sensor produces an Alternating Current (AC) signal. The Electronic Brake Control Module (EBCM) uses the frequency of the AC signal to calculate the wheel speed.