C1955 Steering Angle Sensor Circuit Open
The C1955 code indicates an open circuit in the steering angle sensor circuit. This sensor is a critical component of the Electronic Stability Control (ESC) system, measuring steering wheel rotation and angle to send data to the control module. An open circuit means the control module is not receiving the expected electrical signal, typically due to a physical break in the wiring, a loose or corroded connector, or a damaged sensor. This fault usually disables active safety systems, turning on the ABS or traction control warning light on the dashboard.
1. Commonly Affected Makes
2. Most Common Causes
- Open or broken wiring in the steering angle sensor circuit
- Corroded, bent, or unplugged sensor connector
- Faulty or internally damaged steering angle sensor
- Blown fuse in the sensor circuit
- Internal failure in the brake/chassis control module (BCM or ABS module)
3. Symptoms You Will Notice
- ABS or traction control warning light illuminated
- Stability control system disabled or inoperative
- Steering angle sensor not calibrated or showing erratic readings
4. Step-by-Step Diagnosis
Scan the vehicle for diagnostic trouble codes and verify C1955 is present
Visually inspect the steering angle sensor wiring and connector for damage, corrosion, or loose connections
Check the sensor fuse and replace if blown
Test the sensor's power and ground circuits with a multimeter
If circuits are intact, replace the steering angle sensor and recalibrate if necessary
5. Frequently Asked Questions
Is it safe to drive?▼
Driving with this code is not recommended because the stability control system is disabled, increasing the risk of loss of vehicle control, especially in emergency maneuvers or slippery conditions. Have the issue diagnosed and repaired promptly.
How much does it cost to fix?▼
Repair costs typically range from $200 to $600, depending on the cause. A sensor replacement can cost $150–$400 for parts and labor, while wiring repairs may be less. Diagnostic fees are usually $100–$150.