Accelerator Pedal Kickdown Switch
2014-2021 BMW i3 Range Extender
Description
The DME detected a fault in the accelerator pedal kickdown switch circuit. The kickdown switch signals full throttle request for transmission downshift. This is a convenience feature fault rather than a driveability concern.
Symptoms
- No kickdown during full throttle acceleration
- Transmission may not downshift when floored
- Check Engine Light
Common Causes
- Faulty kickdown switch in accelerator pedal
- Wiring issue to kickdown switch
- Accelerator pedal module failure
- Connector corrosion
Diagnostic Steps
- Test kickdown switch signal with scan tool while pressing pedal fully
- Inspect accelerator pedal connector
- Test switch continuity
- Check wiring to DME
Repair Notes
Replace the accelerator pedal module if the kickdown switch is integrated and has failed.
Related Codes
Other Powertrain Codes
- P0070Ambient Air Temperature Sensor Circuit
- P0071Ambient Air Temperature Sensor Range/Performance
- P0072Ambient Air Temperature Sensor Circuit Low
- P0073Ambient Air Temperature Sensor Circuit High
- P0115Engine Coolant Temperature (ECT) Sensor 1 Circuit
- P0116ECT Sensor 1 Circuit Range/Performance
- P0117ECT Sensor 1 Circuit Low Input
- P0118ECT Sensor 1 Circuit High Input
- P0119ECT Sensor 1 Circuit Intermittent
- P0125Insufficient Coolant Temperature for Closed Loop Fuel Control
P1634 on Other Vehicles
Common Questions
What does code P1634 mean on a 2014-2021 BMW i3?
P1634 stands for "Accelerator Pedal Kickdown Switch". The DME detected a fault in the accelerator pedal kickdown switch circuit. The kickdown switch signals full throttle request for transmission downshift. This is a convenience feature fault rather than a driveability concern.
What are the symptoms of P1634 on a BMW i3?
Common symptoms of P1634 include: No kickdown during full throttle acceleration, Transmission may not downshift when floored, Check Engine Light.
What causes P1634 on a 2014-2021 BMW i3?
Common causes of P1634 include: Faulty kickdown switch in accelerator pedal, Wiring issue to kickdown switch, Accelerator pedal module failure, Connector corrosion.