Check Engine Light After Installing Catless Downpipe and Front Pipe !

[Boostblue965]

Hey everyone,

I'm experiencing an issue with my 2023 Civic after installing a catless downpipe and front pipe. After the installation, I got a check engine light. And got P0420 code To address this, I used Hondata FlashPro to disable the secondary O2 sensor. Drove the car The problem seemed to be resolved initially, but unfortunately, the check engine light reappeared after starting the car again in two days, even though the sensor is still disabled.

Has anyone else experienced a similar issue? Any suggestions on what might be causing the check engine light to come back despite the sensor being disabled? Could there be another factor at play here that I'm missing?

Thanks in advance for any advice or insights!

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[CTRAWR]

Have you tried disabling it in the DTC section of the misc?

 

[Jester04]

DTC tabs is where it is at. There will be more codes too.

 

[Boostblue965]

Have you tried disabling it in the DTC section of the misc?

No I’ve not , but I figured it out , I’ve installed of the shelf tune that came with the flash pro and now no more code , hopefully that will work

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