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:
Crash Pad. Repair procedures
Replacement
Cluster Replacement
•
When prying with a flat-tip screwdriver, wrap it with
...
To decrease the cruising speed
Follow either of these procedures:
Push the SET- switch and hold it. Your vehicle will gradually slow down.
Release the switch at the speed you want to maintain.
Push the SET- switch and ...
Opening the fuel filler lid
The fuel filler lid must be opened from inside the vehicle by pushing the fuel
filler lid opener button.
✽ NOTICE
If the fuel filler lid will not open because ice has formed around it, ...
