BMW DTC U1237 – Message Monitoring OBD Transmission Data Signal Error
DTC U1237 meaning on BMW
DTC U1237 on a BMW refers to a Message Monitoring OBD Transmission Data Signal Error. This diagnostic trouble code indicates that there is a communication error related to the transmission data signal within the onboard diagnostics system of the vehicle.
BMW DTC U1237 symptoms
Symptoms of DTC U1237 on a BMW may include:
- Check Engine Light (MIL) illuminated
- Transmission shifting issues
- Reduced vehicle performance
- Transmission warning messages on the instrument cluster
BMW DTC U1237 causes
Possible causes of DTC U1237 on a BMW include:
- Faulty transmission control module
- Wiring or connection issues in the transmission data signal circuit
- Interference from other electronic components
- Software glitches in the onboard diagnostics system
BMW DTC U1237 seriousness
The seriousness of DTC U1237 on a BMW depends on the underlying cause. Ignoring this fault code can lead to potential transmission issues and further damage if not addressed promptly. It is recommended to diagnose and resolve the issue to prevent any long-term problems.
How to diagnose DTC U1237 on BMW
To diagnose DTC U1237 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the transmission control module for any visible damage
- Check the wiring and connections in the transmission data signal circuit
- Perform a transmission system test to identify any performance issues
How to fix DTC U1237 on BMW
To fix DTC U1237 on a BMW, the following steps may be taken:
- Repair or replace any damaged wiring or connections in the transmission data signal circuit
- Update the software of the transmission control module if necessary
- Clear the fault code and reset the system to see if the issue reoccurs
- If the problem persists, further diagnostics may be required to pinpoint the exact cause
How to erase DTC U1237 on BMW
To erase DTC U1237 on a BMW, the fault code can be cleared using a diagnostic scanner or by disconnecting the vehicle’s battery for a few minutes. However, it is important to address the root cause of the fault code before clearing it to prevent it from reappearing.
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.