U120B – BMW DTC

BMW DTC U120B – Message Monitoring Torque Hybrid Check Sum Error

DTC U120B meaning on BMW

The DTC U120B code on a BMW indicates a Message Monitoring Torque Hybrid Check Sum Error. This error is related to the hybrid system in the vehicle and specifically involves a discrepancy in the torque values being monitored.

BMW DTC U120B symptoms

Symptoms of the DTC U120B code on a BMW may include:

• Check Engine Light illuminated
• Reduced power or performance
• Hybrid system warning light on
• Issues with hybrid system operation

BMW DTC U120B causes

The DTC U120B code on a BMW can be caused by various factors, including:

• Corrupted data in the hybrid system
• Faulty torque sensors
• Wiring or connection issues in the hybrid system
• Software glitches or errors

BMW DTC U120B seriousness

The DTC U120B code should be addressed promptly as it can affect the performance and operation of the hybrid system in the BMW. Ignoring this error code may lead to further complications and potential damage to the vehicle.

How to diagnose DTC U120B on BMW

To diagnose the DTC U120B code on a BMW, a mechanic may perform the following steps:

1. Use a diagnostic scanner to retrieve the specific error code
2. Inspect the hybrid system components for any visible damage or issues
3. Check the torque sensors and related wiring for proper connection and functionality
4. Perform a software update or reset on the hybrid system

How to fix DTC U120B on BMW

To fix the DTC U120B code on a BMW, the following steps may be taken:

1. Address any underlying issues identified during the diagnostic process
2. Repair or replace faulty torque sensors or wiring as needed
3. Reset the error code using a diagnostic scanner
4. Test drive the vehicle to ensure the issue has been resolved

How to erase DTC U120B on BMW

To erase the DTC U120B 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 the error codes from the system
3. Wait for the scanner to confirm that the DTC U120B code has been successfully erased
4. Disconnect the scanner and start the vehicle to ensure the code is no longer present

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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