Readiness - Catalyst


Oct 2, 2019
Z4 35i & 335i
I often see mention of people struggling to pass vehicle inspections over in the US specifically the catalyst readiness status.

I have no idea how things work over there so excuse the possibly dumb question, but would setting the status of the catalyst monitor to "Not Available" allow people to pass without needing a "DP Fix"?

Just been playing around with diagnostic routines related to the primary cats as I have them removed and wanted to get rid of any background routines related to them since they will invariably fail. I found a simple binary selector that lets you disable whatever diagnostic routines you want. I turned off the one for catalyst monitoring and have been driving around without any issues for a while, I noticed as a side effect the readiness state now states "Not Avail." when scanned.