BMW DTC U1155 – Message Monitoring Transmission Data2 Check Sum Error
DTC U1155 meaning on BMW
The DTC U1155 code on a BMW indicates a Message Monitoring Transmission Data2 Check Sum Error. This error occurs when the data being transmitted between various control modules in the vehicle does not match the expected check sum value.
BMW DTC U1155 symptoms
Symptoms of the DTC U1155 code on a BMW may include:
- Check Engine Light illuminated
- Transmission shifting issues
- Reduced vehicle performance
BMW DTC U1155 causes
Common causes of the DTC U1155 code on a BMW include:
- Faulty transmission control module
- Interference in data transmission between control modules
- Wiring or connection issues
BMW DTC U1155 seriousness
The DTC U1155 code should be addressed promptly as it can lead to transmission issues and affect the overall performance of the vehicle. Ignoring this code may result in further damage to the transmission system.
How to diagnose DTC U1155 on BMW
To diagnose the DTC U1155 code on a BMW, a mechanic would typically:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the transmission control module and related wiring
- Perform a thorough check of the data transmission between control modules
How to fix DTC U1155 on BMW
To fix the DTC U1155 code on a BMW, the following steps may be taken:
- Repair or replace any faulty wiring or connections
- Address any issues with the transmission control module
- Reset the fault codes and test drive the vehicle to ensure the issue is resolved
How to erase DTC U1155 on BMW
To erase the DTC U1155 code on a BMW, a mechanic can use a diagnostic scanner to clear the fault codes stored in the vehicle’s system. Once the codes are cleared, the mechanic should test drive the vehicle to ensure 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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