U0444 – BMW DTC

BMW DTC U0444 – Invalid Data Received From Body Control Module ‘C’

DTC U0444 meaning on BMW

DTC U0444 on a BMW indicates that the Engine Control Module (ECM) has detected invalid data from the Body Control Module ‘C’. This means that there is a communication error between the ECM and the Body Control Module ‘C’, which could potentially affect the vehicle’s performance and functionality.

BMW DTC U0444 symptoms

Symptoms of DTC U0444 on a BMW may include:

• Check Engine Light illuminated
• Problems with power windows, door locks, or other body control functions
• Erratic behavior of interior lights
• Issues with central locking system

BMW DTC U0444 causes

The possible causes of DTC U0444 on a BMW include:

• Faulty wiring or connectors between the ECM and Body Control Module ‘C’
• Defective Body Control Module ‘C’
• Software issues in the ECM or Body Control Module ‘C’
• Interference from other electronic components

BMW DTC U0444 seriousness

While DTC U0444 may not always result in immediate drivability issues, it is important to address this fault as it can lead to malfunctions in critical vehicle systems controlled by the Body Control Module ‘C’. Ignoring this fault could potentially result in safety concerns or further damage to the vehicle.

How to diagnose DTC U0444 on BMW

To diagnose DTC U0444 on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes and identify the specific details of the U0444 code
2. Inspect the wiring and connectors between the ECM and Body Control Module ‘C’ for any signs of damage or corrosion
3. Check for any software updates or reprogramming that may be required for the ECM or Body Control Module ‘C’
4. Perform a communication test between the ECM and Body Control Module ‘C’ to verify proper data exchange

How to fix DTC U0444 on BMW

To fix DTC U0444 on a BMW, the following steps may be taken:

1. Repair or replace any damaged wiring or connectors between the ECM and Body Control Module ‘C’
2. If the Body Control Module ‘C’ is found to be faulty, it may need to be replaced
3. Ensure that the ECM and Body Control Module ‘C’ have the latest software updates installed
4. Clear the fault codes using a diagnostic scanner after the repairs have been completed

How to erase DTC U0444 on BMW

To erase DTC U0444 on a BMW, follow these steps:

1. Connect a diagnostic scanner to the vehicle’s OBD-II port
2. Access the scanner’s menu to clear the fault codes stored in the ECM
3. Follow the on-screen prompts to erase the DTC U0444 code
4. Once the code has been cleared, perform a test drive to ensure the issue has been resolved

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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