OBD-II trouble code
C0455: Steering Wheel Position Sensor Circuit
The stability-control system detected a fault in the steering wheel position (angle) sensor circuit. Stability control and traction control are usually disabled and a 'Service StabiliTrak' or ESC message often appears, but the car still steers and brakes normally.
Quick facts
- System
- Chassis
- Category
- Stability Control / Steering
- Severity
- Medium severity
- Drivable
- Usually safe to drive short-term
- Repair cost range
- $0 – $500
- DIY difficulty
- Intermediate DIY
What does C0455 mean?
The steering wheel position sensor (also called the steering angle sensor) tells the electronic stability control system which way and how far the driver is steering. The electronic brake control module (EBCM) compares that steering input against the yaw-rate sensor and the four wheel speeds to decide whether the vehicle is going where the driver is pointing it; if it isn't, stability control brakes individual wheels to correct a slide. C0455 sets when the module cannot trust the steering position circuit — the signal is missing, out of range, or resistance in the wiring has climbed too high.
When the steering angle input is lost, the module can no longer calculate the intended path, so it disables stability control (often shown as 'Service StabiliTrak' or 'Service ESC' on GM vehicles) and usually traction control as well, and lights the matching warnings. Your basic steering and braking are unaffected — the vehicle drives and stops normally — but the stability and traction assists stay off until the fault is repaired.
On many GM vehicles, C0455 and its companion C0710 are very commonly caused not by a failed sensor but by fretting corrosion in the connector between the steering position sensor and the module: tiny dark deposits build up on the terminals where they make contact, and a connector with a little too much play lets the pins move and lose connection. GM's own service guidance is explicit that you should not simply replace the sensor for this condition — the correct fix is to clean the terminals, apply dielectric grease, and shim the connector so it stays tight. Confirm the exact definition and repair procedure in service data for your specific vehicle, because steering-sensor codes and their calibration steps vary by manufacturer.
Common causes
- Fretting corrosion on the steering position sensor connector terminals (very common on GM)
- Loose or high-clearance connector letting the pins move and lose contact
- High resistance, chafing, or an open in the sensor wiring
- Failed steering wheel position/angle sensor
- Sensor never calibrated after an alignment, clockspring, or steering-component service
- Poor ground or low system voltage to the module
Symptoms
- Stability control (ESC/StabiliTrak) warning light or message
- Traction control warning light
- ABS light may also be on
- Stability and traction control disabled
- Steering and normal braking unaffected
Diagnostic steps
- 1.Scan the ABS/stability module and record C0455 and any companion codes (C0710 commonly accompanies it).
- 2.View steering angle live data and turn the wheel lock to lock; a signal that freezes, jumps, or reads out of range confirms a circuit problem.
- 3.Disconnect and inspect the steering position sensor connector for fretting corrosion (dark smudges on the terminals) and check for excessive connector play.
- 4.Clean the terminals, apply dielectric grease, and secure the connector per the manufacturer procedure before condemning the sensor.
- 5.Perform a voltage-drop and continuity check on the sensor's power, ground, and signal wiring, and confirm the module has a clean ground.
- 6.If wiring and connector are good and the code persists, replace the sensor, then perform the required steering angle sensor calibration/relearn and road-test.
Repair cost
$0 – $500
When the cause is connector fretting corrosion, the repair can cost little more than shop time to clean and reseat the connector — sometimes essentially $0 in parts. A steering angle sensor calibration/relearn is often a low-cost scan-tool procedure. If the sensor itself is faulty, parts typically run $100-$350 plus labor and a mandatory calibration, pushing a shop total toward $300-$500. Always rule out the connector before buying a sensor.
Estimate your repair
Run the numbers for your vehicle
Open the Repair Cost Estimator with steering angle sensor calibration / replacement preselected. Adjust labor rate and vehicle category to fit your situation.
DIY vs shop
This is an intermediate DIY job. It usually involves diagnostic steps, specialty parts, and some careful work in tight spaces. If you have the tools and a service manual or trustworthy video for your specific vehicle, it is achievable in a weekend. Otherwise, a competent independent shop will be faster.