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.
Throttle Position Sensor: Operation
The Throttle Position Sensor (TPS) contains two actual value potentiometers for detecting the position of the throttle valve. The second potentiometer is designed to form a reference value. The system will switch over to the second potentiometer if the first one fails. The TPS cannot be serviced separately. If the TPS fails, the throttle body must be replaced. Refer to the throttle body service procedures. See THROTTLE BODY .
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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