Question: Why the V1.26 PCMtuner is unable to read VW VAG:2.0L TDI(EDC17C74) ECU? The read button is gray, what does this mean?
This VW ECU needs to read VR files on the VZ-performance server.
How to read VR files?
1. Log in VZ-performance server: https://support.vz-performance.com
2. Search >> Enter part number to search VR files >> Download
3. Go back PCMFlash to load VR files then read.
Hope this can help.