BMW DTC U11A2 – Lost Communication With Transmission Data via A-CAN
DTC U11A2 meaning on BMW
The DTC U11A2 code on a BMW indicates a communication error between the transmission control module and other modules in the vehicle via the A-CAN (Access Control Area Network) communication network. This error typically means that the transmission control module is not receiving or transmitting data properly over the network.
BMW DTC U11A2 symptoms
Symptoms of the DTC U11A2 code on a BMW may include:
- Check Engine Light (MIL) illuminated
- Transmission shifting issues
- Reduced vehicle performance
- Vehicle may go into limp mode
BMW DTC U11A2 causes
Common causes of the DTC U11A2 code on a BMW include:
- Faulty transmission control module
- Issues with the A-CAN communication network
- Loose or corroded wiring/connectors
- Software glitches or programming errors
BMW DTC U11A2 seriousness
The DTC U11A2 code should be addressed promptly as it can lead to transmission malfunctions and affect the overall drivability of the vehicle. Ignoring this code may result in further damage to the transmission system and other related components.
How to diagnose DTC U11A2 on BMW
To diagnose the DTC U11A2 code on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer
- Inspect the transmission control module for any visible damage or signs of malfunction
- Check the A-CAN communication network for faults or interruptions
- Inspect wiring harnesses and connectors for looseness or corrosion
- Perform a software update or reprogramming if necessary
How to fix DTC U11A2 on BMW
To fix the DTC U11A2 code on a BMW, the following steps may be taken:
- Repair or replace any damaged wiring or connectors in the A-CAN network
- Replace the transmission control module if it is found to be faulty
- Perform a software update or reprogramming to address any programming errors
- Clear the fault codes and perform a test drive to ensure the issue is resolved
How to erase DTC U11A2 on BMW
To erase the DTC U11A2 code on a BMW, a diagnostic scanner can be used to clear the fault codes stored in the vehicle’s computer. After the codes are cleared, it is recommended to perform a test drive to ensure that the issue has been resolved and the code does not reappear.
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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