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:
How to use this manual
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Your Owner’s Manual can assist you in many ways. We strongly recommend that you
read the entire manual. In order ...
Yaw-rate and Lateral G Sensor. Repair procedures
Removal
1.
Turn ignition switch OFF and disconnect the negative (-) battery
cable.
2.
Remove the floor console.
3.
...
Indicator light
When ignition switch is turned to ON, the indicator light illuminates, then goes
off if the ESC system is operating normally. The ESC indicator light blinks whenever
ESC is operating or illumina ...
