BMW DTC U1239 – Message Monitoring Torque Request Crankshaft Driving Dynamics Check Sum Error
DTC U1239 meaning on BMW
The Diagnostic Trouble Code (DTC) U1239 for BMW refers to ¨Message Monitoring Torque Request Crankshaft Driving Dynamics Check Sum Error.¨ This code indicates a communication error related to the torque request signal from the crankshaft sensor in the driving dynamics system.
BMW DTC U1239 symptoms
Symptoms of the BMW DTC U1239 may include:
- Check Engine Light (MIL) illuminated
- Reduced engine performance
- Transmission shifting issues
- Vehicle may go into limp mode
BMW DTC U1239 causes
Common causes of the BMW DTC U1239 include:
- Faulty crankshaft sensor
- Wiring or connection issues in the torque request circuit
- Software glitches in the driving dynamics system
BMW DTC U1239 seriousness
The seriousness of the BMW DTC U1239 code lies in its potential to affect the engine performance and drivability of the vehicle. Ignoring this code can lead to further damage and safety concerns.
How to diagnose DTC U1239 on BMW
To diagnose the DTC U1239 on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the crankshaft sensor and its wiring for any visible damage
- Check the connections in the torque request circuit
- Perform a driving dynamics system test using diagnostic tools
How to fix DTC U1239 on BMW
To fix the DTC U1239 on a BMW, consider the following:
- Replace a faulty crankshaft sensor if necessary
- Repair any damaged wiring or connections in the torque request circuit
- Update the software in the driving dynamics system
- Clear the fault codes and perform a test drive to ensure the issue is resolved
How to erase DTC U1239 on BMW
To erase the DTC U1239 on a BMW, use a diagnostic scanner to clear the fault codes stored in the vehicle’s system. After clearing the code, perform a test drive to confirm that the issue 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
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