U120E – BMW DTC

BMW DTC U120E – Message Monitoring Status Drive Hybrid Check Sum Error

DTC U120E meaning on BMW

The DTC U120E code on a BMW indicates a Message Monitoring Status Drive Hybrid Check Sum Error. This error code is related to the hybrid system in the vehicle and typically points to a communication issue or data discrepancy within the hybrid control module.

BMW DTC U120E symptoms

Symptoms of the DTC U120E code on a BMW may include:

• Check Engine Light (MIL) illuminated
• Hybrid system warning light on
• Reduced hybrid system performance
• Possible drivability issues

BMW DTC U120E causes

Common causes of the DTC U120E code on a BMW include:

• Communication errors between modules
• Data corruption within the hybrid control module
• Faulty hybrid control module
• Electrical issues

BMW DTC U120E seriousness

The DTC U120E code should be addressed promptly as it can affect the performance and drivability of the hybrid system in the BMW. Ignoring this code may lead to further complications and potential safety hazards while driving.

How to diagnose DTC U120E on BMW

To diagnose the DTC U120E code on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer
2. Inspect the hybrid control module for any visible damage or signs of corrosion
3. Check the wiring and connections related to the hybrid system for any issues
4. Perform a communication test between modules to identify any communication errors

How to fix DTC U120E on BMW

To fix the DTC U120E code on a BMW, the following steps may be taken:

1. Repair any damaged wiring or connections related to the hybrid system
2. Replace the hybrid control module if it is found to be faulty
3. Clear the fault codes using a diagnostic scanner after the repairs have been made
4. Perform a test drive to ensure the issue has been resolved

How to erase DTC U120E on BMW

To erase the DTC U120E code on a BMW, follow these steps:

1. Connect a diagnostic scanner to the vehicle’s OBD-II port
2. Select the option to clear fault codes from the menu
3. Follow the on-screen prompts to erase the DTC U120E code
4. Once the code has been cleared, disconnect the scanner and start the vehicle to ensure the code does not return

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.