U0071 – BMW DTC

BMW DTC U0071 – Vehicle Communication Bus E (-) High

DTC U0071 meaning on BMW

The DTC U0071 code for BMW refers to a communication bus error. Specifically, it indicates that there is a high voltage condition detected on the vehicle communication bus E (-) line.

BMW DTC U0071 symptoms

Symptoms of the DTC U0071 code on a BMW may include:

• Check Engine Light (CEL) illuminated on the dashboard
• Problems with communication between various control modules
• Issues with data transfer between vehicle systems

BMW DTC U0071 causes

Common causes of the DTC U0071 code on a BMW include:

• Faulty wiring or connectors in the communication bus system
• Defective control modules or sensors
• Interference from aftermarket electronic devices

BMW DTC U0071 seriousness

While the DTC U0071 code may not always result in immediate drivability issues, it is important to address communication bus errors promptly. Ignoring this code could lead to further malfunctions in the vehicle’s electronic systems.

How to diagnose DTC U0071 on BMW

To diagnose the DTC U0071 code on a BMW, a mechanic may perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes
2. Inspect the wiring and connectors in the communication bus system
3. Check for any loose connections or damaged components
4. Test the control modules and sensors for proper functionality

How to fix DTC U0071 on BMW

To fix the DTC U0071 code on a BMW, the following steps may be taken:

1. Repair or replace any damaged wiring or connectors in the communication bus system
2. Address any issues with control modules or sensors that may be causing the communication error
3. Ensure that aftermarket electronic devices are not interfering with the vehicle’s communication bus

How to erase DTC U0071 on BMW

To erase the DTC U0071 code on a BMW, the fault codes can be cleared using a diagnostic scanner. After addressing the underlying cause of the communication bus error and making necessary repairs, the code can be reset to turn off the Check Engine Light.

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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