Intake Manifold Throttle Position Sensor Range/Performance Problem

The computer is looking at the intake manifold throttle position sensor and sees voltages that aren't making sense, so it thinks something's wrong with the throttle's position.

The control module expects the throttle position sensor to vary between 0.5V at closed throttle to 4.5V at wide open. If it reads outside this range, the code is triggered.

Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.

1. 1Check for intake manifold leaks around the throttle body.
2. 2Inspect wiring and connector for the throttle position sensor; look for fraying or loose connections.
3. 3Verify throttle position voltage at the sensor; should be between 0.5V and 4.5V while operating.
4. 4If the voltage is incorrect, replace the throttle position sensor and retest the system.
5. 5If the sensor is fine, check for issues in the throttle body or ECM adjustments.

• Faulty throttle position sensor
• Wiring issues (shorts or open circuits)
• Intake manifold leaks
• Throttle body issues
• ECM failure

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