P1646 - Dual accelerator sensor error (closed position)

What does P1646 mean?

This error occurs when the dual accelerator sensors report an issue while the pedal is in the closed (idle) position. It suggests a mismatch or fault.

• Faulty accelerator sensor A or B
• Incorrect pedal positioning
• Wiring issue affecting both sensors

Click steps to track your progress.

1. 1

   Check both accelerator sensors and their wiring.

2. 2

   Ensure the accelerator pedal is fully returning to the closed position.

3. 3

   Verify sensor signals are consistent at idle.