PRL Catless DP Check Engine Light Issue

Hey Guys,

I recently installed the PRL Catless DP/FP Combine for my 10th Gen SI and it drives more like a race car now, LOL. Love the purchase. However, the check engine light came out about like 50 miles after installation. I have the defouler installed too but no sure why the CEL still showed up. Do I need to reflash the ECU using Ktuner. If so, where can i find within Ktuner memo to turn off the CEL or it's automatic?

Thanks!

you need to disable the secondary O2 sensors
defouler doesn't always work

dc2turbo said:

you need to disable the secondary O2 sensors
defouler doesn't always work

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Good to know, just found a deal on the catless PRL DP/FP + PRL "Stage 1" Intake hose + AFE drop in filter for $565. Yay local facebook groups!

dc2turbo said:

you need to disable the secondary O2 sensors
defouler doesn't always work

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How to disable them? I used Ktuner to and disabled P0420 (catalyst efficiency), but the CEL came back again after around 20-30 miles of driving.

Stanim said:

How to disable them? I used Ktuner to and disabled P0420 (catalyst efficiency), but the CEL came back again after around 20-30 miles of driving.

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Which code do you have?

360glitch said:

Which code do you have?

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Just checked, it was the P0139 - O2 sensor slow response,lol. I might have to disable that too.

Which Facebook group?

Stanim said:

Just checked, it was the P0139 - O2 sensor slow response,lol. I might have to disable that too.

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@KTuner I just recently saw this as a recent add to the code dissable options. What's causing this code?

paging Vit....? no? /toosoon

kshawn said:

@KTuner I just recently saw this as a recent add to the code dissable options. What's causing this code?

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Slow O2 response.

KTuner said:

Slow O2 response.

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I'm guessing it's for thoes with the PRL catted pipe and the defouler

kshawn said:

I'm guessing it's for thoes with the PRL catted pipe and the defouler

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Even un-catted if a defouler is used, but not positioned properly.

KTuner said:

Even un-catted if a defouler is used, but not positioned properly.

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Mine is uncatted with defouler installed, that's why the code showed up. I am pretty sure the defouler is installed properly,lol. Anyway, disabled the code and everything is fine now.

KTuner said:

Even un-catted if a defouler is used, but not positioned properly.

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Does a normal scanner tool delete the code? tried with mine but says its a permanent code that can't be deleted tell fixed do i need to get k tuner or hondata to delete code i'am getting p0420 code with catted downpipe

stuffle69 said:

Does a normal scanner tool delete the code? tried with mine but says its a permanent code that can't be deleted tell fixed do i need to get k tuner or hondata to delete code i'am getting p0420 code with catted downpipe

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A scanner tool will not delete the code, you will need a tuning solution to be able to do this