Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Component Functional Description - Steering Angle Sensor
Depending on the vehicle, the Steering Angle Sensor (SAS) can be mounted on the Steering Column, or incorporated into the Steering Column Control Module (SCCM) or Steering Gear. The SAS signal is broadcast on the CAN bus. The SAS signal is used by several modules to monitor the Steering Wheel position and rate of change for vehicle stability control, Engine Stop/Start enabling and autonomous operations.
The PCM rationalizes the Wheel Speed Sensor signals against each other and uses the Wheel Speed Sensor signals to rationalize the Steering Angle Sensor signal.
- If the steering angle input is high (wheel turned) when the vehicle comes to a stop, and the vehicle is equipped with Electric Power Steering, the PCM will disable ESS mode. The Electric Power Steering can draw Battery voltage down quickly if the wheel is turned significantly and the engine is turned off.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.