bought a 98 Z3 2.8 Auto a couple of months ago, Love it!

Only thing is about once every week or two I get a CIL. Run the codes with a PEAK tool and get a fault on Secondary AirFlow on the rear bank.

Can anybody help with the cause? I don't know if it's not starting the air pump, or not getting to the rear part of the Y.

Maybe this O2 sensor is not working sometimes?

Anybody have a starting point for this problem?

Love the car but this is really irritating to have to reset every couple of weeks.

Any help would be appreciated.

Dan Bachman
Central Kansas