P2A03 ACURA – O2 Sensor Circuit Range/Performance Bank 2 Sensor 1

P2A03 ACURA Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P2A03 ACURA Possible Causes

Air fuel ratio (A/F) sensor 1,Air fuel ratio (A/F) sensor 1 heater,Fuel pressure,Fuel injector,Intake air leaks

P2A03 ACURA Description

The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sensor. The sensor element of the A/F sensor 1 is composed an electrode layer, which transports ions. It has a heater in the element. The sensor is capable of precise measurement Lambda = 1, but also in the lean and rich range. Together with its control electronics, the sensor outputs a clear, continuous signal throughout a wide Lambda range. The exhaust gas components diffuse through the diffusion layer at the sensor cell. An electrode layer is applied voltage, and this current relative oxygen density in lean. Also this current relative hydrocarbon density in rich. Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this electrode layer of current. In addition, a heater is integrated in the sensor to ensure the required operating temperature of about 800?? (1,472??).