Hyundai Santa Fe (DM): Heated Oxygen Sensor (HO2S). Description and Operation - Engine Control System - Engine Control/Fuel SystemHyundai Santa Fe (DM): Heated Oxygen Sensor (HO2S). Description and Operation

Description

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.
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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 Engine Mechanical System - "Intake Manifold") 3. Disconnect the ...

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] A/F Ratio (λ) Output Voltage(V) RICH Approx. 0.9 LEAN Approx. 0.04 ...

See also:

Alternator. Components and Components Location
Components 1. OAD (Overrunning Alternator Decoupler) 2. Front bracket 3. Front bearing 4. Rotor 5. Rear bearing 6. Rear bracket 7. Through bolt 8. Regulator assembly 9. Regulator bolt 10. Rear cover ...

Repair procedures
Replacement • Put on gloves to protect your hands. • When prying with a flat-tip screwdriver, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage. 1. ...

General Service Information
General Service Information Protection Of The Vehicle Always be sure to cover fenders, seats, and floor areas before starting work. The support rod must be inserted into the hole near the edge of the hood ...