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U1188 – BMW DTC

BMW DTC U1188 – Message Monitoring Engine Data Group 2 Check Sum Error

DTC U1188 meaning on BMW

The DTC U1188 code on a BMW indicates a Message Monitoring Engine Data Group 2 Check Sum Error. This error occurs when the checksum value calculated by the control module does not match the expected value for the specified data group.

BMW DTC U1188 symptoms

Symptoms of the DTC U1188 code on a BMW may include:

  • Check Engine Light (MIL) illuminated
  • Reduced engine performance
  • Transmission shifting issues

BMW DTC U1188 causes

Common causes of the DTC U1188 code on a BMW include:

  • Corrupted data in the engine control module
  • Faulty wiring or connections in the communication network
  • Software issues in the control module

BMW DTC U1188 seriousness

The DTC U1188 code should be addressed promptly as it can lead to drivability issues and potential damage to the vehicle if left unresolved. Ignoring this code may result in further complications and increased repair costs.

How to diagnose DTC U1188 on BMW

To diagnose the DTC U1188 code on a BMW, a mechanic would typically perform the following steps:

  1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s control modules
  2. Inspect the wiring and connections in the communication network for any signs of damage or corrosion
  3. Check for any software updates or reprogramming needed for the control module

How to fix DTC U1188 on BMW

To fix the DTC U1188 code on a BMW, the following steps may be taken:

  1. Clear the fault codes using a diagnostic scanner and monitor for code reoccurrence
  2. Repair any damaged wiring or connections in the communication network
  3. Update the software in the control module if necessary

How to erase DTC U1188 on BMW

To erase the DTC U1188 code on a BMW, follow these steps:

  1. Use a diagnostic scanner to clear the fault codes from the vehicle’s control modules
  2. Perform a test drive to ensure the code does not reappear

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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