Having trouble with your Subaru’s VDC light? That pesky C0057 code showing up on your scanner might be the culprit. Your car’s stability control system is trying to tell you something important, and understanding this code could save you time, money, and frustration. Let’s break down exactly what’s happening and how you can get your Subaru back to peak performance.
What Is the Subaru C0057 Code?
The Subaru C0057 code specifically indicates a fault in your Vehicle Dynamics Control (VDC) system. This diagnostic trouble code typically points to a steering angle sensor malfunction that has disabled your stability control features. When this happens, your car’s computer essentially shuts down the VDC system as a precautionary measure.
Your steering might feel normal during regular driving, especially at low speeds, but behind the scenes, important safety systems like traction control and ABS may not be functioning as designed. This isn’t just an annoying dashboard light—it affects how your Subaru handles in challenging conditions.
Common Symptoms of Subaru C0057
When your Subaru triggers a C0057 code, you’ll likely notice several telltale signs:
- VDC warning light illuminated on your dashboard
- Traction control and ABS warning lights may also be lit
- Hill-start assist features become disabled
- “Eyesight” driver assistance systems may stop working
- Normal steering feel but potential stability issues at high speeds
Interestingly, your check engine light might not come on at all, as C0057 may be stored as a history fault without triggering the main engine warning light until other related problems develop.
What Causes the C0057 Code in Subarus?
Understanding what triggers this code is crucial for effective troubleshooting. Here are the most common causes:
| Cause | Description |
|---|---|
| Steering Angle Sensor Issues | Sensor failure, misalignment, or calibration problems |
| Electrical Problems | Corroded connectors, circuit shorts, or poor ground connections |
| Module Communication Errors | ABS or ECM module faults preventing proper VDC function |
| Recent Service Work | Improper alignment procedure or incomplete system reset after service |
| Towing-Related Issues | Vehicle towed with engine running, disrupting sensor calibration |
The steering angle sensor is particularly sensitive to alignment problems. After any wheel alignment, suspension work, or steering component replacement, the sensor needs proper calibration to accurately track your steering wheel’s position.
How to Diagnose a Subaru C0057 Code
Finding the root cause requires a systematic approach. Here’s how to tackle the problem:
1. Scan and Clear the Code
Start by connecting an OBD-II scanner that can access chassis module information. Record all stored codes, then clear them to see if C0057 returns immediately or after driving. If it comes back instantly, you’re likely dealing with an active fault rather than an intermittent issue.
2. Check Steering Angle Sensor Data
Using a scan tool with live data capabilities:
- Monitor the steering angle readings while turning the wheel
- Verify the values change smoothly as you turn
- Confirm the reading returns to zero (or close to it) when the wheel is centered
- Erratic readings or values that don’t return to zero indicate sensor problems
According to online discussions about Subaru steering angle sensors, a properly functioning sensor should show consistent, predictable readings that match your steering wheel position.
3. Inspect Wiring and Connections
Examine the electrical components in the steering angle sensor circuit:
- Check connectors for corrosion, moisture damage, or loose pins
- Look for damaged wiring in the harness running from the sensor to the ABS module
- Test for voltage and continuity in the sensor circuit
- Pay special attention to ground connections, which often cause intermittent issues
4. Perform Sensor Alignment and Calibration
If physical inspection shows no problems, the sensor likely needs calibration:
- Park on a level surface with wheels pointing straight ahead
- Center the steering wheel precisely
- Use a factory-level scan tool to access the VDC “Hot Function” menu
- Select and complete the Steering Angle Calibration procedure
- Clear all codes and test drive to verify the fix
Several YouTube tutorials demonstrate this calibration process, making it easier to understand the procedure before attempting it yourself.
5. Replace Components if Necessary
If calibration fails to resolve the issue, component replacement may be needed:
- The steering angle sensor (Subaru part number 27549AL00A for many Outback models)
- Clock spring assembly if damaged
- VDC/ABS module (in rare cases)
Repair Costs for Subaru C0057 Issues
Budget-conscious owners should know what to expect for repairs:
| Repair Option | Typical Cost Range |
|---|---|
| DIY Calibration (with proper scan tool) | $0-$100 (tool rental) |
| Professional Calibration Service | $80-$120 |
| Steering Angle Sensor Replacement | $150-$350 (parts and labor) |
| Wiring Repair | $50-$150 |
| VDC/ABS Module Replacement | $800-$1,200 |
The good news is that many C0057 issues can be resolved with simple calibration procedures rather than expensive parts replacement. Even if you need a new sensor, the cost is relatively modest compared to many other automotive repairs.
Preventive Measures to Avoid C0057 Problems
You can take several steps to prevent this code from recurring:
- After any alignment service, ask the technician to verify steering angle sensor calibration
- Keep your battery in good condition, as low voltage can trigger intermittent C0057 events
- Protect underbody wiring harnesses from water, salt, and road debris
- When getting clock spring or airbag work done, ensure the shop resets the steering angle sensor
- If your vehicle must be towed, request a flatbed rather than wheel lift when possible
Is Driving With Code C0057 Safe?
While your Subaru will still drive and steer normally with a C0057 code present, you’re missing important safety features. The VDC system helps prevent skids and maintains stability in emergency maneuvers or slippery conditions.
Think of it this way: you can drive without VDC, but you’re giving up an important safety net that could prevent an accident. For everyday driving in good conditions, it’s relatively low risk, but addressing the issue should be a priority, especially before facing challenging weather or road conditions.
DIY or Professional Repair?
Whether to tackle this problem yourself depends on your technical comfort level:
DIY-friendly tasks:
- Code scanning and clearing
- Visual inspection of wiring and connectors
- Basic steering angle sensor calibration (with the right scan tool)
Best left to professionals:
- Complex electrical diagnostics
- Component replacement involving the steering column
- ABS/VDC module programming
- Clock spring replacement
Many auto parts stores offer free code scanning, but most consumer-grade scanners can’t access the advanced functions needed for proper VDC calibration. Professional shops have factory-level scanners that can perform these specialized tasks correctly.
Subaru Models Commonly Affected by C0057
This code appears across many Subaru models, including:
- Outback
- Forester
- Impreza
- Legacy
- Crosstrek
- WRX
The steering angle sensor design is similar across the Subaru lineup, making the diagnostic and repair approach consistent regardless of which model you drive.
Conclusion
The Subaru C0057 code, while concerning, is often fixable without major expense. By understanding the steps to diagnose and resolve steering angle sensor issues, you can restore your vehicle’s safety systems and clear those annoying dashboard lights.
Remember that your car’s VDC system is an important safety feature designed to keep you in control during challenging driving situations. Addressing this code promptly ensures your Subaru maintains all the safety capabilities it was designed to provide.
