U1814 – BMW DTC

BMW DTC U1814 – Lost Communication With Status 2 Hybrid/EV Battery

DTC U1814 meaning on BMW

DTC U1814 on a BMW indicates a communication error with the Status 2 Hybrid/EV Battery. This diagnostic trouble code (DTC) is specific to hybrid or electric vehicles and suggests a problem with the communication system between the vehicle’s control modules and the hybrid/EV battery.

BMW DTC U1814 symptoms

Symptoms of DTC U1814 on a BMW may include:

• Check Engine Light (CEL) illuminated
• Hybrid/EV system warning light on
• Reduced hybrid/EV performance
• Loss of regenerative braking

BMW DTC U1814 causes

Possible causes of DTC U1814 on a BMW include:

• Faulty hybrid/EV battery
• Issues with the communication network
• Faulty control module
• Wiring or connection problems

BMW DTC U1814 seriousness

The seriousness of DTC U1814 on a BMW depends on the underlying cause. Ignoring this code can lead to reduced hybrid/EV performance and potential safety issues. It is recommended to address this issue promptly to ensure the proper functioning of the hybrid/EV system.

How to diagnose DTC U1814 on BMW

To diagnose DTC U1814 on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes
2. Inspect the hybrid/EV battery for any visible damage
3. Check the wiring and connections related to the hybrid/EV system
4. Perform a communication system test to identify any network issues

How to fix DTC U1814 on BMW

To fix DTC U1814 on a BMW, you may need to:

1. Repair or replace the faulty hybrid/EV battery
2. Address any wiring or connection issues
3. Reset the control modules and clear the fault codes
4. Perform a system reset or calibration as needed

How to erase DTC U1814 on BMW

To erase DTC U1814 on a BMW, you can:

1. Use a diagnostic scanner to clear the fault codes
2. Ensure that the underlying issue has been resolved before clearing the code
3. Perform a test drive to confirm that the code does not return