KTuner.com

Posted: **Wed May 12, 2021 4:28 pm**

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.

Posted: **Wed May 12, 2021 5:09 pm**

It likely will. The only suggestion we can give it to flash back to factory for emissions purposes.

Posted: **Thu Jul 29, 2021 10:52 am**

Thank you for this advice.

KTuner.com

O2 Readiness with P0138/9 - O2 Sensor Slow Response checked

O2 Readiness with P0138/9 - O2 Sensor Slow Response checked

Re: O2 Readiness with P0138/9 - O2 Sensor Slow Response checked

Re: O2 Readiness with P0138/9 - O2 Sensor Slow Response checked