BMW DTC U1145 – Lost Communication With NOx Sensor (Bank 2)
DTC U1145 meaning on BMW
The Diagnostic Trouble Code (DTC) U1145 for BMW indicates a communication error with the NOx (Nitrogen Oxide) sensor located in Bank 2 of the vehicle. This error means that the Engine Control Module (ECM) or related control modules are unable to receive data from the NOx sensor in Bank 2.
BMW DTC U1145 symptoms
Symptoms of the DTC U1145 in a BMW may include:
- Check Engine Light (MIL) illuminated on the dashboard
- Reduced engine performance or power
- Potential increase in emissions
BMW DTC U1145 causes
Common causes of the DTC U1145 in a BMW include:
- Faulty NOx sensor in Bank 2
- Wiring or connection issues between the NOx sensor and the ECM
- ECM software or hardware problems
BMW DTC U1145 seriousness
The DTC U1145 should not be ignored as it can lead to increased emissions and potential engine performance issues. It is important to address this code promptly to ensure the vehicle operates efficiently and meets emission standards.
How to diagnose DTC U1145 on BMW
To diagnose the DTC U1145 on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the ECM.
- Inspect the wiring and connections leading to the NOx sensor in Bank 2 for any damage or corrosion.
- Test the NOx sensor in Bank 2 using a multimeter to check for proper functionality.
- Check for any software updates for the ECM that may address communication issues.
How to fix DTC U1145 on BMW
To fix the DTC U1145 on a BMW, consider the following:
- Replace the faulty NOx sensor in Bank 2 if it is determined to be the cause of the communication error.
- Repair or replace any damaged wiring or connectors leading to the NOx sensor.
- If software issues are suspected, update the ECM software to the latest version.
How to erase DTC U1145 on BMW
To erase the DTC U1145 on a BMW after the issue has been resolved, use a diagnostic scanner to clear the fault codes stored in the ECM. Ensure that the repair has been completed successfully before clearing the code to prevent it from reoccurring.