U120D – BMW DTC

BMW DTC U120D – Lost Communication With Status Drive Hybrid

DTC U120D meaning on BMW

DTC U120D on a BMW indicates a ¨Lost Communication With Status Drive Hybrid¨ fault. This diagnostic trouble code (DTC) is specific to hybrid vehicles and suggests a communication issue between the hybrid system components and the vehicle’s control modules.

BMW DTC U120D symptoms

Symptoms of DTC U120D on a BMW may include:

• Check Engine Light (CEL) illuminated
• Hybrid system warning light on
• Reduced hybrid system performance
• Issues with hybrid system functionality

BMW DTC U120D causes

Common causes of DTC U120D on a BMW include:

• Faulty hybrid system components
• Communication errors between control modules
• Wiring or connection issues
• Software glitches

BMW DTC U120D seriousness

The seriousness of DTC U120D on a BMW depends on the underlying cause. Ignoring this fault can lead to potential performance issues with the hybrid system and may affect the overall drivability of the vehicle. It is recommended to address this DTC promptly to prevent further complications.

How to diagnose DTC U120D on BMW

To diagnose DTC U120D on a BMW, follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes
2. Inspect the hybrid system components for any visible damage
3. Check the wiring and connections for any signs of wear or corrosion
4. Perform a communication test between control modules
5. Consult the vehicle’s service manual for specific diagnostic procedures

How to fix DTC U120D on BMW

To fix DTC U120D on a BMW, consider the following:

1. Repair or replace faulty hybrid system components
2. Address any wiring or connection issues
3. Update control module software if necessary
4. Clear the fault codes and perform a test drive to verify the repair
5. If unsure, seek assistance from a professional mechanic or dealership

How to erase DTC U120D on BMW

To erase DTC U120D on a BMW:

1. Use a diagnostic scanner to clear the fault codes
2. Ensure the underlying issue has been resolved before clearing the codes
3. Perform a test drive to confirm the fault codes do not return
4. If the codes persist, further diagnosis may be required

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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