Wow, thank you so much
maryjane and
lnxguy! You are both absolutely right!
I looked up Malone Tuning, which took me to a Tunezilla page, contacted them and they found that my car had a Stage 2.9 tune with deletes (EGR, DPF, Throttle Valve, SCR and Swirl Valve) done about 3 years ago.
So scan tools will still work despite the tune? That’s great news. I will take your advice
maryjane and
lnxguy, I’ll get the diagnostic tool and report back here with codes.
I deeply appreciate your insight, thanks again, stay tuned! (No pun intended
)