Except California

PURPOSE
Two oxygen sensors, one for each exhaust manifold, measure the oxygen content in the exhaust and send a voltage signal to the ECM.

CONSTRUCTION
Each sensor consists of a steel housing, sensor tip, and its protective sleeve. The sensor tip itself is made from a platinum covered zirconium-oxide pipe.

OPERATION
A measureable voltage is generated by comparing the amount of oxygen in the exhaust gas with the amount in the ambient air.

The sensor operates only within a certain temperature range of approx. 545 - 1530°F (285 - 850°C).

The exhaust gases reach the outer surface of the oxygen sensor tip via the openings in the protective sleeve. Ambient air reaches the sensor's inner surface via channels. The differance in oxygen content produces a voltage read by the ECM.