My STI has a COBB turbo-back,first-generation AccessPORT,and legal CAI. It passes visual. The AccessPORT is supposed to disable the monitor that detects the P0420 cat-inefficiency code and set the CEL. At Smog Check (plug-in,no tailpipe test),all monitors showed Ready and it passed. Can anyone explain.

 

Just because the monitor is disabled doesn't mean that it won't show as ready.

That downpipe should have failed visual.

 

Thanks. I didn't realize that. So can a disabled monitor also show as Not Ready? Was I lucky?

 

I'm not keen on how the tuning actually works. I wouldn't think that the monitor is completely disabled. I bet that the threshold for triggering a CEL was changed. So the monitor is still there do what it's supposed to. But any value it reports won't trigger an alarm.


But like I said, an aftermarket downpipe should not have passed.


The smog tech can be crappy with the visual portion. But they can't really fight the OBDII check.

 

yes, you were lucky basically. Should not have passed visual period.

 

I modified the downpipe to make it appear factory. It looks legal and runs clean.

 

You should find another topic to talk about then. Nothing to see here.

 

lol