C0057 is a manufacturer-specific chassis code. Its exact definition depends entirely on the vehicle make, as the generic SAE slot for this code is officially reserved.
Because it applies to different systems, the exact factory definition must be verified before diagnosis. This code identifies a detected fault condition but does not automatically prove a specific component has failed.
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Key Takeaways
- C0057 is a manufacturer-specific code with different meanings depending on the vehicle make and application.
- On Subaru applications, it typically indicates an ECM Control System or CAN communication fault between the ABS/VDC module and the ECM.
- On certain GM applications, it can point to a rear wheel speed sensor circuit fault or an ABS motor relay issue.
- Accurate diagnosis requires verifying the exact factory definition for your specific vehicle before testing or replacing any components.
C0057 Code Description and Implications
C0057 is a manufacturer-specific diagnostic trouble code. Because the generic SAE slot is reserved, its exact definition and the monitored system depend entirely on the manufacturer and application.
Some Subaru applications: C0057 indicates an ECM Control System or communication circuit fault. The ABS/VDC module fails to receive valid data from the Engine Control Module over the CAN bus.
Certain GM applications: C0057 can represent a rear wheel speed sensor circuit low condition or an ABS motor relay circuit fault, affecting the anti-lock braking system.
Common Causes of the C0057 Code
Because C0057 applies to entirely different systems depending on the vehicle, the possible causes vary significantly by application.
For Subaru applications: An underlying engine P-code, damaged CAN bus wiring, or a failing ECM can disrupt communication with the ABS/VDC module.
For GM applications: A failed wheel speed sensor, damaged sensor wiring, or a faulty Electronic Brake Control Module (EBCM) can trigger the code.
Symptoms Associated With C0057
Symptoms depend heavily on the specific system and the underlying fault.
On Subaru applications, drivers may see the Check Engine Light, ABS warning light, and Vehicle Dynamics Control (VDC) off light illuminate simultaneously. Cruise control may also be disabled.
On GM applications, the ABS and traction control systems may become inoperative, and the ABS warning light will illuminate.
MIL behavior varies by application. Some vehicles may illuminate the Check Engine Light immediately, while others may store the DTC and trigger specific chassis system warnings.
Diagnosing the C0057 Trouble Code
Diagnosis must begin by confirming the exact factory definition and service information for the specific make, model, and engine.
Retrieve the code and record any freeze-frame data or related error codes using a scan tool capable of accessing ABS and network communication data.
For Subaru applications, check for any active engine P-codes first, as an engine fault will disable CAN communication and trigger C0057 as a secondary code.
For GM applications, inspect the wheel speed sensor wiring and test the sensor resistance and output signal according to the manufacturer procedure.
Repairing the C0057 Issue
Repairs must follow the confirmed root cause identified during system-specific testing.
If an engine P-code is present on a Subaru, diagnose and repair the engine fault first; clearing the primary fault often resolves the C0057 communication code.
If the CAN bus network is faulty, repair the damaged network wiring or address the failing module communication issue.
If a wheel speed sensor or ABS motor relay fails testing on a GM application, replace the confirmed failed component.
Cost Considerations for C0057 Repairs
Repair costs for C0057 vary widely based on the underlying fault, the specific vehicle application, and local labor rates.
Repairing damaged wiring or clearing a secondary communication code involves minimal parts costs and standard diagnostic labor.
Replacing a wheel speed sensor or an ABS control module involves higher parts costs and moderate labor time.
Cost depends on diagnostic time, component accessibility, required parts, programming requirements, and labor.
Prevention Strategies for Future Occurrences
Keeping the engine bay and undercarriage wiring harnesses secure and protected from road debris can help prevent chafed wires that disrupt network or sensor signals.
Addressing engine performance issues promptly can prevent secondary communication codes from setting in the chassis modules on network-dependent vehicles.
Troubleshooting Tips and Best Practices
Do not assume a C0057 code requires replacing the steering angle sensor or the ABS module immediately; it frequently points to a secondary communication fault or an underlying engine code.
On Subaru applications, do not ignore related engine codes, as the ABS module relies on engine data to operate the Vehicle Dynamics Control system.
Check for applicable technical service bulletins, as manufacturers occasionally release updated ABS modules, revised wiring harness pigtails, or module software recalibrations to address chronic communication faults.
More OBD-II Codes
| C0035 | C0040 | C0045 | C1100 |
| C1102 | C1109 | C1111 | C1116 |
| C1143 | C1203 | C1204 | C1205 |
| C1210 | C1211 | C1235 | P0700 |
| P0500 | P0501 | P0502 | P0504 |
| U0100 | U0101 | U0121 | U0140 |
Frequently Asked Questions
Is C0057 a generic or manufacturer-specific code?
No. While C0057 uses a generic SAE digit format, the specific code slot is officially reserved, making its exact definition entirely manufacturer-specific.
Can a C0057 code cause my ABS and traction control to stop working?
Yes. On applications where C0057 monitors the ABS or VDC communication network, a fault will typically disable the anti-lock braking and traction control systems.
Will C0057 clear itself if I fix an engine code?
On some Subaru applications, C0057 is a secondary communication code triggered by an engine fault. Clearing the primary engine code may resolve the C0057 code.
Is it safe to drive with the C0057 code active?
The vehicle is usually safe to drive to a repair facility, but you will lose ABS, traction control, and potentially cruise control functionality until the fault is resolved.
Does C0057 always mean the steering angle sensor is bad?
No. C0057 does not typically indicate a steering angle sensor fault. It usually points to an ECM communication issue or a wheel speed sensor circuit fault depending on the vehicle.
What Should You Do About the C0057 Code?
Confirm the exact factory definition and technical service bulletins for your specific vehicle application.
Follow the applicable manufacturer diagnostic procedure to test the relevant network communication buses, engine control modules, or wheel speed sensor circuits based on your vehicle’s specific architecture.
Repair or replace the confirmed failed component, then retest the system to ensure the chassis and stability systems operate correctly.
