KTuner.com

Hi! I'm trying to pass emissions and I have a downpipe that doesn't need the P0420 block anymore (it was messing with readiness). My tuner had also checked the O2 Sensor Slow Response box. I was wondering that too will affect readiness and if I need to uncheck it and reflash.

You are gentleman (or lady) and a scholar! Thanks for your help.

KTuner wrote:Exhaust modifications are supported with the included tunes.

Okay to clarify, this means that the tune compensates for any changes a new downpipe brings, not just disabling the check engine light?

I'm trying to get the most out of my car, MPG/HP/Torque. After getting a catback I was thinking about getting a high airflow catted downpipe and matching front pipe. I know that's going to require a tune. What I was wondering is if there's a setting to accommodate that new downpipe or if I need to s...