BMW DTC U1264 – Message Monitoring Slave-ECM with Master-ECM Interconnection 6 Alive Check
DTC U1264 meaning on BMW
The DTC U1264 code on a BMW indicates a communication error between the slave Engine Control Module (ECM) and the master ECM during the 6 Alive Check. This means that the ECMs are not able to establish proper communication, which can lead to various issues in the vehicle’s operation.
BMW DTC U1264 symptoms
Symptoms of the DTC U1264 code on a BMW may include:
- Check Engine Light illuminated
- Poor engine performance
- Transmission shifting problems
- Vehicle stalling
- Reduced fuel efficiency
BMW DTC U1264 causes
The common causes of the DTC U1264 code on a BMW include:
- Faulty ECM(s)
- Wiring or connection issues
- Interference from other electronic components
- Software glitches
BMW DTC U1264 seriousness
The DTC U1264 code should not be ignored as it can lead to potential drivability issues and affect the overall performance of the vehicle. It is recommended to address this code promptly to prevent further damage or safety hazards.
How to diagnose DTC U1264 on BMW
To diagnose the DTC U1264 code on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the wiring and connections between the ECMs
- Check for any software updates or reprogramming needed
- Perform a communication test between the ECMs
How to fix DTC U1264 on BMW
To fix the DTC U1264 code on a BMW, the following steps may be taken:
- Repair or replace any faulty wiring or connections
- Update the ECM software if necessary
- Replace any defective ECM(s)
- Clear the fault codes and perform a test drive to ensure the issue is resolved
How to erase DTC U1264 on BMW
To erase the DTC U1264 code on a BMW, a diagnostic scanner can be used to clear the fault codes stored in the ECM memory. After clearing the codes, it is recommended to perform a test drive to verify 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
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