BMW DTC P2639 – Torque Management Feedback Signal ‘A’ Low
DTC P2639 meaning on BMW
The Diagnostic Trouble Code (DTC) P2639 for BMW refers to the Torque Management Feedback Signal ‘A’ Low. This code indicates that the signal from the torque management system is reading lower than the expected range, potentially causing issues with the vehicle’s performance and drivability.
BMW DTC P2639 symptoms
Symptoms of DTC P2639 on a BMW may include:
- Reduced engine power
- Poor acceleration
- Engine stalling
- Check Engine Light (CEL) illuminated
BMW DTC P2639 causes
Common causes of DTC P2639 on a BMW include:
- Faulty torque management sensor
- Wiring issues or poor connections
- Software glitches in the engine control module
BMW DTC P2639 seriousness
The seriousness of DTC P2639 on a BMW depends on the underlying cause. Ignoring this code can lead to further damage to the vehicle’s drivetrain and may result in unsafe driving conditions. It is recommended to address this issue promptly.
How to diagnose DTC P2639 on BMW
To diagnose DTC P2639 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the torque management sensor and related wiring for any visible damage
- Check the signal output of the sensor using a multimeter
- Verify the software version of the engine control module
How to fix DTC P2639 on BMW
To fix DTC P2639 on a BMW, the following steps may be taken:
- Replace the faulty torque management sensor
- Repair any damaged wiring or connections
- Update the engine control module software to the latest version
How to erase DTC P2639 on BMW
To erase DTC P2639 on a BMW, the fault codes can be cleared using a diagnostic scanner. After addressing the underlying issue and making the necessary repairs, the codes can be reset to see if the problem has been resolved.
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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.