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 Owners Manual: SMART mode
SMART mode selects the proper driving mode among ECO, NORMAL, and SPORT by judging
the driver's driving habits (i.e. mild or dynamic) from the brake pedal depression
or the steering wheel operation.
Press the DRIVE MODE button to activate SMART mode. When SMART mode is activated,
the indicato ...
Hyundai Sonata LF 2014-2019 Service Manual: Specifications
Specifications
ItemsSpecificationRated voltageDC 12VOperating voltage9V ~ 16VOperating speed30?/h ~ 250?/hSensible distance70m (Sedan)Curvature radiusStart : More than 125m/30km/hStop : Less than 125mFrequency24 GHzNumbers2EA (Master 1EA, Slave 1EA)
...