Having to disable all O2 codes?

[Sub8]

Hi all. 09 Z06 with headers and race cats. I'm having to disable all codes associated with front and rear 02 sensors to stop MIL light.

I understand the need for heater control / cat effeciency etc to be disabled. But then it just sets another group. Today is was heater resistance. New sensors working correctly when warm.

What gives? Is it normal to have to turn them all off?

[asteggall]

Normally it's just set all secondary O2 codes to report no error then turn off the CAT efficacy test. Assuming you still have the primary O2s? Then again never dealt with a 09 ZO6 so there may be something else in there.