DTClookup.com

Search DTC

U1861 – BMW DTC

BMW DTC U1861 – Transfer Case Control Module Invalid Data Received From Brake System Control Module ‘A’

DTC U1861 meaning on BMW

DTC U1861 on a BMW indicates that the Transfer Case Control Module has detected invalid data received from the Brake System Control Module ‘A’. This communication error can lead to issues with the transfer case control system.

BMW DTC U1861 symptoms

Symptoms of BMW DTC U1861 may include:

  • Warning lights on the dashboard
  • Problems with the transfer case operation
  • Loss of communication between control modules

BMW DTC U1861 causes

Possible causes of BMW DTC U1861 include:

  • Faulty wiring or connections between the Transfer Case Control Module and Brake System Control Module
  • Defective Control Modules
  • Software issues

BMW DTC U1861 seriousness

The seriousness of BMW DTC U1861 lies in the potential impact on the transfer case operation and overall vehicle performance. Ignoring this issue can lead to further complications and safety concerns.

How to diagnose DTC U1861 on BMW

To diagnose BMW DTC U1861, follow these steps:

  1. Use a diagnostic scanner to retrieve the fault codes
  2. Inspect the wiring and connections between the Transfer Case Control Module and Brake System Control Module
  3. Check for any software updates or reprogramming needed

How to fix DTC U1861 on BMW

To fix BMW DTC U1861, consider the following:

  1. Repair or replace any faulty wiring or connections
  2. Replace defective Control Modules if necessary
  3. Perform software updates or reprogramming as recommended

How to erase DTC U1861 on BMW

To erase BMW DTC U1861, you can:

  1. Use a diagnostic scanner to clear the fault codes
  2. Ensure that the underlying issue has been resolved before clearing the code

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

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.