U0243 – BMW DTC

BMW DTC U0243 – Lost Communication With Parking Assist Control Module ‘B’

DTC U0243 meaning on BMW

DTC U0243 indicates a communication error between the vehicle’s main computer system and the Parking Assist Control Module ‘B’ in a BMW. This error code signifies that the control module ‘B’ is not sending or receiving data properly, leading to a loss of communication.

BMW DTC U0243 symptoms

Symptoms of DTC U0243 in a BMW may include:

• Malfunction or inoperable parking assist system
• Warning lights on the dashboard related to the parking assist system
• Loss of parking assist features such as sensors or camera functionality

BMW DTC U0243 causes

Common causes of DTC U0243 in a BMW include:

• Faulty wiring or connectors between the main computer system and the Parking Assist Control Module ‘B’
• Defective Parking Assist Control Module ‘B’
• Software issues within the control module

BMW DTC U0243 seriousness

While DTC U0243 may not directly affect the drivability of the vehicle, it can lead to the loss of important parking assist features, impacting convenience and safety during parking maneuvers. It is recommended to address this issue promptly to ensure the proper functioning of the parking assist system.

How to diagnose DTC U0243 on BMW

To diagnose DTC U0243 on a BMW, follow these steps:

1. Use a diagnostic scanner to retrieve the specific fault codes stored in the vehicle’s computer system.
2. Inspect the wiring and connectors between the main computer system and the Parking Assist Control Module ‘B’ for any visible damage or corrosion.
3. Perform a communication test using diagnostic tools to check for proper data exchange between the modules.

How to fix DTC U0243 on BMW

To fix DTC U0243 on a BMW, consider the following:

1. Repair or replace any damaged wiring or connectors between the main computer system and the Parking Assist Control Module ‘B’.
2. If the Parking Assist Control Module ‘B’ is faulty, replace it with a new or refurbished unit.
3. Update the software in the control module to address any potential software issues causing the communication error.

How to erase DTC U0243 on BMW

To erase DTC U0243 on a BMW, use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer system. After addressing the underlying cause of the communication error and fixing the issue, perform a system reset to ensure the error code is successfully erased.

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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