Q45 V8-4.5L (VK45DE) (2002)
Oxygen Sensor: Description and Operation
HO2S1
COMPONENT DESCRIPTION
The heated oxygen sensor 1 is placed into the front tube. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated
oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1 V in richer conditions to 0 V in
leaner conditions. The heated oxygen sensor 1 signal is sent to the ECM. The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio.
The ideal air-fuel ratio occurs near the radical change from 1V to 0 V.
System Description
SYSTEM DESCRIPTION
Operation
OPERATION
HO2S2