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.
Steering Angle Sensor
Steering angle sensor is located in steering column. Steering angle sensor consists of a disc with uniform slits, positioned between an LED, a fixed slit and a photo transistor. As steering wheel is turned, disc rotates and blocks light from LED. Light that passes through disc and fixed slit to photo transistor is converted into a 5-volt output signal. Output signal has an "A" phase (4 degree, single cycle) and a "B" phase (one degree, 1/4 cycle) output. TCS control unit uses steering angle sensor signals to detect steering wheel turning angle and direction of turn.
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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.