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:
Filler-Neck Assembly. Repair procedures
Removal
1.
Disconnect the fuel filler hose (A), the vapor tube quick-connector
(B), and the ventilation tube quick-connector (C).
2.
...
Crash Pad. Repair procedures
Replacement
Cluster Replacement
•
When prying with a flat-tip screwdriver, wrap it with
...
Sunroof Motor. Repair procedures
Inspection
1.
Disconnect the negative (-) battery terminal.
2.
Remove the overhead console and roof trim.
(Refer to the BD group - &quo ...
