Oxygen, Lambda Sensor Exhaust Oxygen Sensor (O2 Sensor) Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture NTK "0032" - Not availableFIAT - Doblo, Linea, 500, Fiorino, Qubo; VAUXHALL - Astra, Astravan; OPEL - Astra H, Corsa