Velocity AP 200 Cell Cat / Downpipe Install DIY
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Joined: Mar 2021
Posts: 270
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From: Bayern
Hi Andi...
With a modest decrease in catalyst density (Like your stated 400 Cell), I would say you MAY not need to update the software. It may still be efficient enough to not create a CEL condition? If you are not getting an engine light, I would say just leave it. Just my opinion. You could also install O2 Sensor Bungs on the post Cat O2's and that may also resolve the ECU sniffing out your reduced efficiency. But also, yes, if you have the VAP monitoring tool, the readings could certainly help Chris, though I would imagine they would just use the standard coding for the 200 Cell Cats.
Good luck.
DC
With a modest decrease in catalyst density (Like your stated 400 Cell), I would say you MAY not need to update the software. It may still be efficient enough to not create a CEL condition? If you are not getting an engine light, I would say just leave it. Just my opinion. You could also install O2 Sensor Bungs on the post Cat O2's and that may also resolve the ECU sniffing out your reduced efficiency. But also, yes, if you have the VAP monitoring tool, the readings could certainly help Chris, though I would imagine they would just use the standard coding for the 200 Cell Cats.
Good luck.
DC
No, no problems, no warning lights, no messages in the error memory, great values even with the emissions test, better values than OEM cats!
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