ChassisC1211
CautionSeverity: Caution - get it checked when you can
Attempt to restart assist at high speed
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
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 29
| Brand | Code | Description | System |
|---|---|---|---|
| BAIC Motor | C1211 | wheel speed frequency out of range Brand | Chassis |
| Mercedes-Benz | C1211 | No description available | Chassis |
| BYD | C1211 | RR wheel speed sensor signal Brand | Chassis |
| Chery | C1211 | RR wheel speed sensor signal Brand | Chassis |
| Daewoo | C1211 | Right Rear Wheel Speed Sensor No Signal Brand | Chassis |
| Daihatsu | C1211 | SLA solenoid abnormal Brand | Chassis |
| DFFS | C1211 | Attempt to restart assist at high speed Brand | Chassis |
| DFFX | C1211 | RR wheel speed sensor signal Brand | Chassis |
| Geely | C1211 | RR wheel speed sensor signal Brand | Chassis |
| GM | C1211 | No description available | Chassis |
| Great Wall | C1211 | RR wheel speed sensor signal Brand | Chassis |
| Hafei | C1211 | RR wheel speed sensor signal Brand | Chassis |
| Holden | C1211 | Electronic Control Unit Software Brand | Chassis |
| Hyundai | C1211 | No description available | Chassis |
| Mahindra | C1211 | Wheel speed sensor, rear right; invalid/no signal Brand | Chassis |
| Maserati | C1211 | No description available | Chassis |
| Mitsubishi | C1211 | RR wheel speed sensor signal Brand | Chassis |
| Opel | C1211 | No description available | Chassis |
| Perodua | C1211 | SLA solenoid abnormal Brand | Chassis |
| Peugeot | C1211 | No description available | Chassis |
| Proton | C1211 | RR wheel speed sensor signal Brand | Chassis |
| Saab | C1211 | No description available | Chassis |
| MG (SAIC) | C1211 | Wheel Speed Sensor rear Right Brand | Chassis |
| Smart | C1211 | No description available | Chassis |
| Subaru | C1211 | No description available | Chassis |
| Suzuki | C1211 | ABS Warning Lamp Fault Brand | Chassis |
| Tata | C1211 | Wheel-speed Sensor Brand | Chassis |
| Toyota | C1211 | Attempt to restart assist at high speed Brand | Chassis |
| Volkswagen | C1211 | Seat tilt switch - passenger's 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 3
These 7-character codes are manufacturer-specific variants of C1211 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | C121100 | electrical monitoring of the sensor 2 in the vacuum chamber, i.e. signal is out of Range Brand | Chassis |
| SsangYong | C121100 | WSS rear-RH invalid/no signal Brand | Chassis |
| Hyundai | C121108 | The SCC Module sets DTC when it received abnormal Wheel Speed Sensor(Right Rear) CAN message from ESP(ESC) via CAN Brand | Chassis |
6Related codes
Browse Cxxx codes or C121xx codes.