BMW DTC U1226 – Message Monitoring Transmission Range Control Module Alive Check
DTC U1226 meaning on BMW
The Diagnostic Trouble Code (DTC) U1226 on a BMW refers to the Message Monitoring Transmission Range Control Module Alive Check. This code indicates that there is a communication issue between the transmission range control module and other modules in the vehicle.
BMW DTC U1226 symptoms
Symptoms of DTC U1226 on a BMW may include:
- Transmission shifting issues
- Check Engine Light illuminated
- Reduced vehicle performance
BMW DTC U1226 causes
Common causes of DTC U1226 on a BMW include:
- Faulty transmission range control module
- Wiring or connection issues
- Software glitches
BMW DTC U1226 seriousness
The seriousness of DTC U1226 on a BMW lies in the potential transmission-related problems it can cause. Ignoring this code can lead to further damage to the transmission system and affect the overall drivability of the vehicle.
How to diagnose DTC U1226 on BMW
To diagnose DTC U1226 on a BMW, a mechanic would typically:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the wiring and connections related to the transmission range control module
- Perform a communication test between the modules
How to fix DTC U1226 on BMW
Fixing DTC U1226 on a BMW may involve:
- Replacing the faulty transmission range control module
- Repairing any damaged wiring or connections
- Updating software or performing module reprogramming
How to erase DTC U1226 on BMW
To erase DTC U1226 on a BMW, the fault codes can be cleared using a diagnostic scanner. After the necessary repairs have been made, the codes can be reset to see if 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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