How to delet Bank 1 & 2 Downstream O2 sensors?? Please help

[bstuder11]

I am trying to deactivate the O2s on a 2000 chevy 3/4 ton pickup with the 5.7 Vortec and the L31 operating system. I am having a really hard time finding in the software where I can go in and shut them off. I have went in and deactivated the cat protecion, and shut off the DTC falt indicators and the Calibration.Diagnostic Enablers for these sensors, but I dont actually see how I can "turn them Off" Help please! Thanks, Studer

[Taz]

Hello Bstuder11,

If you are not using post cat O2s in your setup - go to the "Engine DTC Processing Enablers" folder - set the following to "Not Reported"

• P0137
• P0138
• P0140
• P0141
• P0157
• P0158
• P0160
• P0161
• P0420
• P0430

Hopefully I didn't miss any ...


Regards,
Taz

[bstuder11]

Yeah, I already did all that but I thought there was still something Else I had to do to dissable those O2s......

[Taz]

That's all that is necessary to disable them via the tune ... could physically remove them if you want.


Regards,
Taz

[bstuder11]

man I just saw that my post that said thank you didnt post....Thank You Very Much, thats all I needed to do and has worked on every vehicle since

[EagleMark]

That turns off all the error codes, but does it also turn off the feedback from post CAT sensors? Or do you still have to physically remove/unplug?

[bstuder11]

That turns off all the error codes, but does it also turn off the feedback from post CAT sensors? Or do you still have to physically remove/unplug?

Disabling the DTC's will make the computer not even look at those o2's or anything else u disable in the dtc list. Then u need to disable the same things in the mil list so you don't get a check engine light. Just disable anything with a number 2 after it and disable the catylist efficiency dct and mil.

[EagleMark]

I didn't think that would work with the post CAT sensors still hooked up? So I tried and they are still working and affecting fueling. But with the post CAT sensors disconnected it worked like a charm.