Heated Oxygen Sensor (HO2S) consists of zirconium and alumina and is installed both upstream and downstream of the Manifold Catalytic Converter. The sensor output voltage varies in accordance with the air/fuel ratio.

The sensor must be hot in order to operate normally. To keep it hot, the sensor has a heater which is controlled by the ECM via a duty cycle signal. When the exhaust gas temperature is lower than the specified value, the heater warms the sensor tip.

Knock Sensor (KS). Repair procedures

Removal 1. Turn the ignition switch OFF and disconnect the battery negative (-) cable. 2. Remove the intake manifold (Refer to “Intake ...

Heated Oxygen Sensor (HO2S). Specifications

Specification HO2S [Bank 1/Sensor 1] Item Specification Heater Resistance (Ω) 2.5 ~ 4.0 [20°C(68°F)] HO2S [Bank 1/Sensor 2 ...

See also:

Repair procedures - Revised
Fuel Pressure Test 1. Release the residual pressure in fuel line (Refer to “Release Residual Pressure in Fuel Line” in this group). ...

Front Wiper Motor. Repair procedures
Removal 1. Loosen the windshield wiper arm nut (A) after removing a wiper cap (B). 2. Remove the windshield wiper arm and blade (A ...

Telemetics Unit (TMU). Repair procedures
Removal 1. Remove the audio monitor (or AVN head unit) after loosening the mounting screws. (Refer to the BE group - "Audio Unit" or "AVN Unit" ...