Multiple if then optimization

[skimask]

What if you stop the engine and start it again ??? ... first value will be > 10 , due to the exhaust gases still in the exhaust tubing ... and I do not see any LCDOUT $FE,1 in this figure.
Alain

Exhaust gases might still be in the tubing, but I wonder how quickly the sensor will cool off and not make a decent output. In my experience, those things cool off fairly quick. But then again, the 3/4 wire ones heat up pretty fast too...