U11E4 – BMW DTC

BMW DTC U11E4 – Message Monitoring Transmission Data Check Sum Error

DTC U11E4 meaning on BMW

The DTC U11E4 code on a BMW indicates a Message Monitoring Transmission Data Check Sum Error. This error occurs when the control module detects a discrepancy in the data checksum of the transmission messages.

BMW DTC U11E4 symptoms

Symptoms of the BMW DTC U11E4 code may include:

• Check Engine Light (MIL) illuminated
• Transmission shifting issues
• Reduced vehicle performance

BMW DTC U11E4 causes

Common causes of the BMW DTC U11E4 code include:

• Faulty transmission control module
• Interference or noise in the transmission data communication
• Wiring or connection issues in the transmission system

BMW DTC U11E4 seriousness

The DTC U11E4 code should be addressed promptly as it can lead to transmission malfunctions and potentially affect the overall drivability of the vehicle. Ignoring this code may result in further damage to the transmission system.

How to diagnose DTC U11E4 on BMW

To diagnose the DTC U11E4 code on a BMW, follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s control module.
2. Inspect the transmission control module for any visible damage or signs of water intrusion.
3. Check the wiring and connectors in the transmission system for any loose connections or corrosion.
4. Perform a thorough inspection of the transmission system to identify any potential issues causing the checksum error.

How to fix DTC U11E4 on BMW

To fix the DTC U11E4 code on a BMW, consider the following steps:

1. Clear the fault codes using a diagnostic scanner and see if the code returns.
2. Inspect and repair any damaged wiring or connectors in the transmission system.
3. If the transmission control module is faulty, consider replacing it with a new or remanufactured unit.
4. Ensure that the transmission system is properly grounded and shielded to prevent interference.

How to erase DTC U11E4 on BMW

To erase the DTC U11E4 code on a BMW, follow these steps:

1. Use a diagnostic scanner to clear the fault codes stored in the vehicle’s control module.
2. After clearing the codes, perform a test drive to ensure that the code does not return.
3. If the code persists, further diagnosis and repairs may be necessary to resolve the underlying issue.

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.