BMW DTC P1639 – Throttle Valve Position Control Throttle Stuck Permanently (Bank 1)
DTC P1639 meaning on BMW
The Diagnostic Trouble Code (DTC) P1639 for BMW indicates an issue with the Throttle Valve Position Control Throttle Stuck Permanently on Bank 1. This means that the throttle valve in the intake system is stuck in a fixed position, causing a malfunction in the throttle control system.
BMW DTC P1639 symptoms
Symptoms of DTC P1639 on a BMW may include:
- Reduced engine power
- Engine stalling or rough idling
- Difficulty accelerating
- Check Engine Light illuminated on the dashboard
BMW DTC P1639 causes
Common causes of DTC P1639 on a BMW include:
- Throttle valve stuck due to carbon buildup
- Malfunctioning throttle position sensor
- Faulty throttle control module
- Wiring or connection issues in the throttle control system
BMW DTC P1639 seriousness
The seriousness of DTC P1639 on a BMW lies in the potential safety hazards it poses. A stuck throttle valve can lead to a loss of engine power or control, increasing the risk of accidents. It is crucial to address this issue promptly to ensure the vehicle’s safe operation.
How to diagnose DTC P1639 on BMW
To diagnose DTC P1639 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the throttle valve for any physical obstructions or sticking
- Check the throttle position sensor for proper operation
- Inspect the wiring and connections in the throttle control system
How to fix DTC P1639 on BMW
To fix DTC P1639 on a BMW, the following steps may be taken:
- Clean the throttle valve to remove any carbon buildup
- Replace the throttle position sensor if faulty
- Repair or replace the throttle control module if necessary
- Ensure all wiring and connections in the throttle control system are secure and functioning properly
How to erase DTC P1639 on BMW
To erase DTC P1639 on a BMW, a diagnostic scanner can be used to clear the fault codes stored in the vehicle’s computer system. Once the underlying issue causing the fault code has been addressed and fixed, the code can be cleared to reset the Check Engine Light.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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