v35 02 sensor delete help

[RR350GT]

I need to delete my 02 sensor have changed exhaust now have light on 

[Duncan]

No, what you need to do is get an O2 sensor bung welded onto the new exhaust. The factory ECU relies heavily on accurate O2 readings at all times. 

[joshuaho96]

2 hours ago, Duncan said:

No, what you need to do is get an O2 sensor bung welded onto the new exhaust. The factory ECU relies heavily on accurate O2 readings at all times. 

Presumably what they're actually trying to say is they deleted the catalytic converters and they want to disable the codes.

[Duncan]

Does not having a cat result in error lights? I'm sure my Titan has less than factory and it runs OK (similar ECU)

[joshuaho96]

3 minutes ago, Duncan said:

Does not having a cat result in error lights? I'm sure my Titan has less than factory and it runs OK (similar ECU)

Depends on which ones are monitored. Any monitored cat deleted will trigger a catalyst efficiency code. Also worth mentioning on modern cars the post-cat O2 is actually used for fuel control, when recovering from DFCO they look for the fuel to hit the post-cat O2 before they pull out enrichment. I personally refuse to ever work on decatted cars because the exhaust is so unpleasant to be around.