Hi

Yes I have performed a search of the archives and a forum search [1st thing I always do!]

I have rechecked the O2 readings, flat line @ 400mV Approx. I have re-checked the O2 heater circuit on the scope, this is OK.

If anyone knows how to test the MAF from the ECU board I would be very interested to hear.

I might be having a blond moment but, what else will cause the O2 sensor to flat line? My understanding was that this type of O2 sensor was self generating. So, testing by scope should provide me with some sort of switching if I add additional hydrocarbons or air.

Can I get of this round about yet Dad?!?!?!

Regards

Simon