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U1211 – BMW DTC

BMW DTC U1211 – Message Monitoring 100ms Task Check Sum Error

DTC U1211 meaning on BMW

The DTC U1211 code on BMW vehicles indicates a Message Monitoring 100ms Task Check Sum Error. This error occurs when the checksum of a message being monitored does not match the expected value within a 100ms task.

BMW DTC U1211 symptoms

Symptoms of the DTC U1211 code on BMW may include:

  • Check Engine Light (MIL) illuminated
  • Communication issues with vehicle modules
  • Potential drivability issues

BMW DTC U1211 causes

Common causes of the DTC U1211 code on BMW vehicles include:

  • Faulty communication module
  • Interference in the communication network
  • Software issues

BMW DTC U1211 seriousness

The DTC U1211 code on BMW is considered a moderate severity issue. While it may not directly affect the drivability of the vehicle, it can lead to communication problems between vehicle modules and potentially impact overall vehicle performance.

How to diagnose DTC U1211 on BMW

To diagnose the DTC U1211 code on a BMW, a mechanic would typically perform the following steps:

  1. Use a diagnostic scanner to retrieve the fault codes
  2. Inspect the communication modules for any visible damage
  3. Check for any loose connections or wiring issues
  4. Perform a network communication test to identify the source of the error

How to fix DTC U1211 on BMW

To fix the DTC U1211 code on a BMW, the following steps may be taken:

  1. Repair or replace any faulty communication modules
  2. Address any wiring or connection issues
  3. Update software to the latest version
  4. Clear the fault codes and perform a test drive to ensure the issue is resolved

How to erase DTC U1211 on BMW

To erase the DTC U1211 code on a BMW, a diagnostic scanner can be used to clear the fault codes from the vehicle’s memory. Once the codes are cleared, the vehicle should be driven to ensure the issue does not reoccur.

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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