How to safely adjust fuel trims on a modern V6 using TunerPro without triggering CEL?

roseblack · Post by **roseblack** » Sun Nov 09, 2025 6:20 pm

Hi everyone, I’m tuning a modern V6 engine with TunerPro and want to make small adjustments to the fuel trims for better mid-range performance. I’m concerned about triggering the check engine light or causing long-term issues. Does anyone have a recommended step-by-step approach or settings in TunerPro that are safe for this type of tuning? Any tips on monitoring changes in real-time would also be appreciated.