Removing rear O2 sensor on 01-newer PCMs -- Things you should know

[Sinister Performance]

IIRC that will only make the car run like crap because of it still running the cat test but not setting a code. It will still make the car go lean because it's trying to do the test.

Every car the cat test runs on I've seen run RICH when the diagnostic test is active, not lean. Rich as in 11:1 AFR or somewhere around there.

[Pure2sin]

Every car the cat test runs on I've seen run RICH when the diagnostic test is active, not lean. Rich as in 11:1 AFR or somewhere around there.

I meant rich not lean..brainfart.