Throttle/Pedal Position Sensor D Maximum Stop Performance

Where it lives

For P2166, the description names the sensor as the part involved.

Check these first

• A failed throttle or pedal position sensor D
• A wiring fault between the sensor D and the ECM
• Corrosion at the sensor D connector
• A throttle body or accelerator pedal assembly fault
• An ECM calibration fault

What to do next

1. Read the throttle position sensor D voltage on a scan tool
2. Move the pedal to the maximum stop and watch the signal
3. Test the sensor D wiring to the ECM
4. Clean the sensor D connector
5. Replace the throttle or pedal position sensor D if the signal is out of range
6. Clear the code and retest

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