ChassisC0502
CautionSeverity: Caution - get it checked when you can
Left Front Wheel Speed Sensor A Circuit Low
Key terms: ABS: anti-lock braking, which stops the wheels locking · Stability control: helps stop the car skidding · Wheel speed sensor: measures how fast each wheel turns · SAE J2012: the standard generic code list
1What it means in plain English
A chassis system has a fault, usually ABS, traction control or stability control, but some makes use this range for airbags, electric power steering or park brakes.
2Common causes
- Faulty wheel speed sensor
- Damaged sensor ring or wiring
- Faulty ABS module
- Low brake fluid
- Wheel bearing damage
3Can I drive?
If the code names an airbag or SRS system, the airbag may not deploy in a crash: have it diagnosed promptly. If it names electric power steering, the assist may fail and the steering can become heavy: stop safely if that happens. If it names the brakes or park brake, have it checked before driving when braking feels abnormal. Otherwise ABS and stability control may be disabled: drive carefully, especially in wet conditions, and have it checked soon.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 14
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | C0502 | Left Front Wheel Speed Sensor A Circuit Low SAE | Chassis |
| Mercedes-Benz | C0502 | Left Front Wheel Speed Sensor A Circuit Low SAE | Chassis |
| Daewoo | C0502 | Left Front Wheel Speed Sensor A Circuit Low SAE | Chassis |
| EOBD | C0502 | Vasaku esiratta kiirusanduri 'A' ahel madal Brand | Chassis |
| GM | C0502 | Left Front Wheel Speed Sensor A Circuit Low SAE | Chassis |
| Holden | C0502 | Left Front Wheel Speed Sensor Circuit Brand | Chassis |
| Isuzu | C0502 | Left Front Wheel Speed Sensor A Circuit Low SAE | Chassis |
| Land Rover | C0502 | Left Front Wheel Speed Sensor A Circuit Low SAE | Chassis |
| Mitsubishi | C0502 | Left Front Wheel Speed Sensor A Circuit Low SAE | Chassis |
| Opel | C0502 | Left Front Wheel Speed Sensor A Circuit Low SAE | Chassis |
| Peugeot | C0502 | Left Front Wheel Speed Sensor A Circuit Low SAE | Chassis |
| Saab | C0502 | Left Front Wheel Speed Sensor A Circuit Low SAE | Chassis |
| Subaru | C0502 | Left Front Wheel Speed Sensor A Circuit Low SAE | Chassis |
| Toyota | C0502 | Left front wheel speed sensor 'A' circuit low Brand | Chassis |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 5
These 7-character codes are manufacturer-specific variants of C0502 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | C050200 | Der Raddrehzahlsensor vorn links hat Kurzschluss nach Masse. Brand | Chassis |
| Mercedes-Benz | C050211 | The left front wheel speed sensor has a short circuit to ground. There is a short circuit to ground. Brand | Chassis |
| Mercedes-Benz | C050214 | The left front wheel speed sensor has a short circuit to ground. There is a short circuit to ground or an open circuit. Brand | Chassis |
| Mercedes-Benz | C050216 | The left front wheel speed sensor has a short circuit to ground. The limit value for electrical voltage has not been attained. Brand | Chassis |
| Mercedes-Benz | C0502FF | WSS FL sensor line is short Battery Brand | Chassis |
6Related codes
Browse Cxxx codes or C050xx codes.