Hyundai Sonata: 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.

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:
Seat Heater Switch. Schematic Diagrams
Circuit Diagram
...
Resetting the sunroof
Whenever the vehicle battery is disconnected or discharged, or related fuse is
open, you must reset your sunroof system as follows:
1.Turn the ignition switch to the ON position and close the sunro ...
Driver Airbag (DAB) Module and Clock Spring. Description and Operation
Description
Driver Airbag (DAB) is installed in the steering wheel and electrically
connected to SRSCM via the clock spring. It protects the driver by deploying
the airbag when frontal crash ...
