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U0105 – BMW DTC

BMW DTC U0105 – Lost Communication With Fuel Injector Control Module

DTC U0105 meaning on BMW

DTC U0105 on a BMW indicates a communication error between the Engine Control Module (ECM) and the Fuel Injector Control Module. This error code signifies that the ECM is unable to establish communication with the fuel injector control module, which can lead to issues with fuel delivery and engine performance.

BMW DTC U0105 symptoms

Symptoms of DTC U0105 on a BMW may include:

  • Engine misfires
  • Reduced engine power
  • Poor fuel efficiency
  • Check Engine Light (CEL) illuminated
  • Difficulty starting the engine

BMW DTC U0105 causes

The common causes of DTC U0105 on a BMW include:

  • Faulty fuel injector control module
  • Wiring or connection issues between the ECM and fuel injector control module
  • Defective ECM
  • Software glitches

BMW DTC U0105 seriousness

DTC U0105 should not be ignored as it can lead to poor engine performance and potential drivability issues. Ignoring this code may result in further damage to engine components and increased fuel consumption.

How to diagnose DTC U0105 on BMW

To diagnose DTC U0105 on a BMW, follow these steps:

  1. Use a diagnostic scanner to retrieve the fault codes.
  2. Inspect the wiring and connectors between the ECM and fuel injector control module for any damage or loose connections.
  3. Check the fuel injector control module for proper functionality.
  4. Perform a software update on the ECM if necessary.

How to fix DTC U0105 on BMW

To fix DTC U0105 on a BMW, consider the following:

  1. Repair or replace any damaged wiring or connectors between the ECM and fuel injector control module.
  2. Replace the faulty fuel injector control module if needed.
  3. If the ECM is found to be defective, it may need to be replaced or reprogrammed.
  4. Clear the fault codes and perform a test drive to ensure the issue is resolved.

How to erase DTC U0105 on BMW

To erase DTC U0105 on a BMW, follow these steps:

  1. Use a diagnostic scanner to clear the fault codes stored in the ECM.
  2. After clearing the codes, start the engine and ensure that the Check Engine Light is no longer illuminated.
  3. Perform a test drive to confirm that the issue has been resolved.

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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