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U1123 – BMW DTC

BMW DTC U1123 – Message Monitoring ARS-Module Status Alive Check

DTC U1123 meaning on BMW

DTC U1123 on a BMW refers to the Message Monitoring ARS-Module Status Alive Check. This diagnostic trouble code indicates that there is a communication issue with the Automatic Ride Control (ARS) module in the vehicle.

BMW DTC U1123 symptoms

Symptoms of DTC U1123 on a BMW may include:

  • ABS warning light illuminated on the dashboard
  • Stability control system malfunction
  • Loss of communication with the ARS module

BMW DTC U1123 causes

Common causes of DTC U1123 on a BMW include:

  • Faulty ARS module
  • Wiring or connection issues
  • Software glitches

BMW DTC U1123 seriousness

The seriousness of DTC U1123 on a BMW depends on the driving conditions and the extent of the communication failure with the ARS module. It is recommended to address this issue promptly to ensure the proper functioning of the vehicle’s stability control system.

How to diagnose DTC U1123 on BMW

To diagnose DTC U1123 on a BMW, follow these steps:

  1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s system
  2. Inspect the wiring and connections related to the ARS module
  3. Perform a visual inspection of the ARS module for any signs of damage
  4. Check for software updates or reprogramming that may be required

How to fix DTC U1123 on BMW

To fix DTC U1123 on a BMW, consider the following:

  1. Repair or replace any damaged wiring or connections
  2. Replace the faulty ARS module if necessary
  3. Update the software in the ARS module to the latest version
  4. Clear the fault codes and perform a test drive to ensure the issue is resolved

How to erase DTC U1123 on BMW

To erase DTC U1123 on a BMW, use a diagnostic scanner to clear the fault codes stored in the vehicle’s system. After addressing the underlying issue causing the fault code, clearing the code will reset the system and turn off the warning light on the dashboard.

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

← All BMW Diagnostic Trouble Codes

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