Hello, I have a very strange problem with Audi A4 B7 1.8t me7. After modyfing software in ECU there is DPF error on FIS display. It appears very occasionally for few seconds, no other symptopms like DTC in ecu or instrumentrs- just DPF icon for few seconds. Ecu has lot of changes as car has about 380hp, so it's not to easy to find which change is causing a problem especially that I have to drive it 20-30km after each change to wait for DPF icon.

Has anyone idea wtf is that?