... the platinum electrode thus generating the voltage signal (Picture 3). Since the atmosphere side of the electrolyte is ... lean exhaust (AFR is high) produces voltages less than 0.1V, while a rich exhaust (AFR is low) can ... 3 Picture 4 Oxygen Sensor for CITROENCITRO C2 1.1,1.6,C3 1.1i,1.6,C4 1.6,2.0,C5 2.0,3.0,C6 3.0 ... ,C8 3.0 96359785