DENSO O2 LAMBDA SENSOR FOR HONDA S2000 AP1 AP2 F20C [SECONDARY POST-CAT SENSOR]This Denso O2 Sensor is a replacement for Honda Part numbers 36532 P8C A01, 36532 P8C A02 or 36532 PCX A01 The air fuel mixture in an engines combustion chamber can affect how hot, how quickly and how cleanly the fuel burns. For optimum combustion, the air to fuel ratio needs to be within a certain window. For specific driving conditions, the engine may run in sub optimal conditions. For example, to be more fuel efficient, the engine may run on a lean