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, OTHERS 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 exhaust
The 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 combustion
Whilst 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 converter
Before a vehicle fails an emission test or the engine check light appears, drivers may notice increased fuel consumption and/or a rough idle
Many lambda sensor failures will simply be a result of age
The 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 contamination
Garagewire January 2020