I had my DPF and SCR deleted from my car about 6 months ago. It's an EDC17C57 ECU on a 2019 Kia Stinger.
A week ago, I got a NOx sensor fault P220f00. I was able to delete the fault with my fault scanner.
Tofay, my car went in for its MOT and failed on the emissions.
When I got the ECU reprogrammed, I was told the emissions would be fine.
Was I right to believe this?
Should the NOX sensor have been deleted on the original reprogram?

Many Thanks for any info