ChassisC0020
CautionSeverity: Caution - get it checked when you can
ABS Pump Motor Control
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 25
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | C0020 | ABS Pump Motor Control SAE | Chassis |
| BAIC Motor | C0020 | ABS Pump Motor Control Brand | Chassis |
| BYD | C0020 | ABS Pump Motor Control Brand | Chassis |
| Chery | C0020 | Reflux pump fault Brand | Chassis |
| Daewoo | C0020 | ABS Pump Motor Control Brand | Chassis |
| DFFS | C0020 | Pump stuck Brand | Chassis |
| DFFX | C0020 | ABS Pump Motor Control Brand | Chassis |
| DFXK | C0020 | Return pump fault Brand | Chassis |
| EOBD | C0020 | ABS-pumpemotorstyring Brand | Chassis |
| Geely | C0020 | Reflux pump fault Brand | Chassis |
| GM | C0020 | ABS Pump Motor Control Brand | Chassis |
| Great Wall | C0020 | Returnpumpfault Brand | Chassis |
| Hafei | C0020 | ABS Pump Motor Control Brand | Chassis |
| Holden | C0020 | Pump Motor Circuit Brand | Chassis |
| Honda | C0020 | ABS Pump Motor Control SAE | Chassis |
| Hyundai | C0020 | ABS Pump Motor Control SAE | Chassis |
| Isuzu | C0020 | ABS Pump Motor Control SAE | Chassis |
| Land Rover | C0020 | ABS pump motor control Brand | Chassis |
| Maserati | C0020 | ABS (Anti-Lock Brake System) Pump Motor Control-Circuit Voltage Below Threshold Brand | Chassis |
| Opel | C0020 | ABS Pump Motor Control Brand | Chassis |
| Peugeot | C0020 | ABS Pump Motor Control SAE | Chassis |
| Proton | C0020 | ABS Pump Motor Control SAE | Chassis |
| Saab | C0020 | ABS Pump Motor Control Brand | Chassis |
| MG (SAIC) | C0020 | Pump Error Brand | Chassis |
| Toyota | C0020 | Reflux pump fault 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 11
These 7-character codes are manufacturer-specific variants of C0020 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | C002000 | OBD relevant DTC in RBS. For detailed information read Fault Memory of RBS Brand | Chassis |
| Mercedes-Benz | C002001 | ABS Pump Motor Control (SubFault): Es liegt ein allgemeiner elektrischer Fehler vor. Brand | Chassis |
| Mercedes-Benz | C002009 | The hydraulic pump in the ESP/regenerative braking system has a malfunction. Counter byte when corresponding SAE Code is used more than one time Brand | Chassis |
| Mahindra | C002009 | Return Flow Pump Error Brand | Chassis |
| Mercedes-Benz | C002013 | ABS Pump Motor Control (SubFault): Es liegt eine Unterbrechung vor. Brand | Chassis |
| Mercedes-Benz | C002015 | The hydraulic pump in the ESP/regenerative braking system has a malfunction. There is a short circuit to positive or an open circuit. Brand | Chassis |
| Mercedes-Benz | C002016 | The hydraulic pump in the ESP/regenerative braking system has a malfunction. The limit value for electrical voltage has not been attained. Brand | Chassis |
| Mahindra | C002016 | Return Flow Pump Supply Error Brand | Chassis |
| Mercedes-Benz | C00201C | ABS Pump Motor Control (SubFault): Spannungsversatz Ventil- Motormasse liegt außerhalb des zulässigen Bereiches. Brand | Chassis |
| Mahindra | C00204B | Hydraulics Overheat Brand | Chassis |
| Mercedes-Benz | C002096 | The hydraulic pump in the ESP/regenerative braking system has a malfunction. There is an internal component fault. Brand | Chassis |
6Related codes
Browse Cxxx codes or C002xx codes.