Steering Angle Sensor Fault
The steering angle sensor is reporting an issue.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The steering angle sensor tells the computer how far you’ve turned the steering wheel and how fast. If it gets a bad signal, it can't help the vehicle know what direction to go, which could affect stability or safety.
What the computer is actually seeing
The computer expects a steady range of voltage values (typically between 0.5 and 4.5 volts) from the steering angle sensor as you turn the wheel. If it sees voltages that fall outside this range or fluctuates erratically, it triggers the C0817 code.
What a healthy reading looks like
Steering angle sensing voltage should be between 0.5V (center) and 4.5V (full turn).
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check wiring and connectors to the steering angle sensor for damage or corrosion. Repair as necessary.
- 2Using a scan tool, check the steering angle sensor data for expected voltage and angle readings. If readings are erratic, proceed to next step.
- 3Test the steering angle sensor with a multimeter. It should show a smooth voltage change as the wheel is turned. If it does not, replace the sensor.
- 4Clear the fault codes and take the vehicle for a test drive. If the C0817 code returns, further investigate the wiring harness and connections.
Common causes
- Faulty steering angle sensor
- Wiring damage or short to ground
- Connector corrosion or bad connections
- Faulty steering column or rack issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderately safe, but steering may be less responsive. Fix it soon.
Will the code come back after clearing it?
If the underlying issue is not fixed, yes, it will likely return.
Why does this code pop up with a stability control light?
Because the steering angle sensor is crucial for the stability control system to function properly.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →