EXHAUST CATALYST OXYGEN LAMBDA SENSOR - REAR

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NEW GENUINE ASTON MARTIN EXHAUST CATALYST LAMBDA OXYGEN HEGO SENSOR ASSEMBLY BLUE CAP CAT MONITOR SENSOR NUMBER 12 ON PICTURE - FITS AFTER THE CATALYSTS SOME MODELS 2 REQUIRED, OTH ERS 4 REQUIRED - 2 PER MANIFOLD - PLEASE CHECK OR EMAIL TO BE SURE FITS ALL YEARS AND MODELS - FOR RAPIDE CHANGES AT MY 2016 - NOT SUITABLE FOR THE VANTAGE V12 S VERSION Lambda sensors operate by measuring the amount of oxygen in the exhaustThe levels calculated by the lambda are sent as data to the ECU which then calculates and determines how best to achieve the ideal mixture of air and fuel at combustionWhilst the pre-cat lambda sensor communicates to the ECU regulating the air/fuel ratio;the post-cat lambda sensor performs a diagnostic role, monitoring the catalytic converterBefore a vehicle fails an emission test or the engine check light appears, drivers may notice increased fuel consumption and/or a rough idleMany lambda sensor failures will simply be a result of ageThe lambda sensor operates in extremely high temperatures so damage to the heater element of the sensor is the most frequent fault, along with vibration/damage and contaminationGaragewire January 2020 Show more