BMW DTC P0644 – Driver Display Serial Communication Circuit
DTC P0644 meaning on BMW
The Diagnostic Trouble Code (DTC) P0644 for BMW refers to a fault in the Driver Display Serial Communication Circuit. This code indicates that there is a communication issue between the vehicle’s control module and the driver display unit.
BMW DTC P0644 symptoms
Symptoms of DTC P0644 on a BMW may include:
- Malfunctioning or blank driver display screen
- Inaccurate or missing information on the display
- Warning lights or messages related to the display system
BMW DTC P0644 causes
Common causes of DTC P0644 on a BMW include:
- Faulty driver display unit
- Wiring or connection issues in the communication circuit
- Defective control module
BMW DTC P0644 seriousness
While DTC P0644 may not directly affect the drivability of the vehicle, it can lead to inconvenience and potential safety concerns due to the loss of important information displayed to the driver. It is recommended to address this issue promptly.
How to diagnose DTC P0644 on BMW
To diagnose DTC P0644 on a BMW, a mechanic would typically:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the driver display unit for any visible damage or malfunctions
- Check the wiring and connections in the communication circuit for any issues
- Test the control module for proper functionality
How to fix DTC P0644 on BMW
To fix DTC P0644 on a BMW, the following steps may be taken:
- Replace the faulty driver display unit if necessary
- Repair any damaged wiring or connections in the communication circuit
- If the control module is defective, it may need to be replaced or reprogrammed
How to erase DTC P0644 on BMW
To erase DTC P0644 on a BMW, the fault code can be cleared using a diagnostic scanner. After addressing the underlying issue that caused the fault code, the code can be cleared to reset the system and ensure that the problem 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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