DTC OFF

What is DTC?

DTC - are Diagnostic Trouble Codes which are shown in diagnostics when something is broken or removed from the car.

By removing Swirl flaps, EGR, DPF and other parts (which don't affect engine performance) will trigger check engine light or other warning lights or messages. So in order to remove them we need to reprogram car ECU so those warnings and performance limitations don't come on.