o2 cross counts ??

[2TURBOT]

my questions are..... by using the cross counts on the 2.1 scanmaster, what is the normal or good o2 sensor movement? when would readings show the o2 becoming lazy? what # readings tell that the o2 is history? thanks

 

[Snorman]

I believe CC's are supposed to cycle from 0-255 within a 30 second period. Any slower, or if the CC is locked on a set number and the O2 sensor is usually bad.
S.