BMW DTC U0073 – Control Module Communication Bus ‘A’ Off
DTC U0073 meaning on BMW
The DTC U0073 code on a BMW indicates that the control module communication bus ‘A’ has been turned off. This means that there is a communication error between various control modules in the vehicle, leading to a loss of data exchange on the communication network.
BMW DTC U0073 symptoms
Symptoms of the DTC U0073 code on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Loss of communication with certain vehicle systems
- Erratic behavior of electronic components
BMW DTC U0073 causes
The DTC U0073 code on a BMW can be caused by various factors, including:
- Faulty control module
- Wiring or connection issues in the communication network
- Software glitches in the control modules
BMW DTC U0073 seriousness
The DTC U0073 code should not be ignored as it can lead to communication breakdown between critical vehicle systems. This can affect the overall performance, safety, and functionality of the BMW.
How to diagnose DTC U0073 on BMW
To diagnose the DTC U0073 code on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the wiring and connections in the communication network
- Check for any software updates for the control modules
How to fix DTC U0073 on BMW
To fix the DTC U0073 code on a BMW, the following steps may be taken:
- Repair or replace any faulty control modules
- Repair any damaged wiring or connections in the communication network
- Update the software in the control modules
How to erase DTC U0073 on BMW
To erase the DTC U0073 code on a BMW, a mechanic can use a diagnostic scanner to clear the fault codes stored in the vehicle’s system. Once the issue has been resolved and the codes cleared, the Check Engine Light should turn off.
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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