Accelerator Pedal Position Sensor 1

Inside the engine control module (ECM), the accelerator pedal position sensor sends a signal that changes based on how much you press the pedal. If this signal is outside the expected range, it triggers this code, indicating a potential issue in the sensor or wiring.

The ECM expects a voltage between 0.5 and 4.5 volts from the accelerator pedal position sensor at idle up to full throttle. If it reads below 0.5V or above 4.5V, this 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. 11. Inspect the wiring and connectors of the accelerator pedal position sensor for damage and secure connection. Decision: Is wiring intact? If no, repair or replace as needed. If yes, proceed to next step.
2. 22. Measure the voltage output from the accelerator pedal position sensor at idle and at full throttle. Decision: Is the voltage within 0.5V - 4.5V? If no, replace the pedal position sensor. If yes, proceed to next step.
3. 33. Check for any ECM updates or faults recorded. Decision: Are there software issues? If yes, update the ECM. If no issues, investigate further.

• Faulty accelerator pedal position sensor
• Wiring or connector issues
• ECM software glitch
• Mechanical binding of the pedal

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