Hyundai Sonata: Engine Control System / Heated Oxygen Sensor (HO2S) Description and Operation
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.

Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Remove the intake manifold (Refer to “Intake And Exhaust System” in EM group).
3.
Disconnect ...
Specification
HO2S [Bank 1/Sensor 1] (Linear type)
ItemSpecificationHeater Resistance (?)2.4 ~ 4.0 [20°C(68°F)]
ItemSpecificationHeater Resistance (?)Approx. 9.0 [20°C(68°F)]
HO2S [Ba ...
Other information:
Hyundai Sonata LF 2014-2019 Service Manual: Alternator Repair procedures
Removal
1.
Disconnect the battery negative terminal.
2.
Loosen the mounting bolts (A) and then, turn the adjusting bolt (B) clockwise to loosen tension.
3.
Remove the drive belt (A).
4.
Disconnect the air compressor connector (A) and the
alternator connector (B), and remove the cab ...
Hyundai Sonata LF 2014-2019 Owners Manual: Jack and tools
➀ Jack handle
② Jack
③ Wheel nut wrench
The jack, jack handle, and wheel lug nut wrench are stored in the luggage compartment
under the luggage box cover.
The jack is provided for emergency tire changing only.
Turn the winged hold down bolt counterclockwise to remove the spare tire.
Store t ...