Hyundai Veloster: 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.

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) 2.4 ~ 4.0 [20°C(68°F)] HO2S [Bank 1/Sensor 2 ...

See also:

Repair procedures
Fuel Pressure Test 1. Release the residual pressure in fuel line (Refer to “Release Residual Pressure in Fuel Line” in this group). ...

Blade replacement
When the wipers no longer clean adequately, the blades may be worn or cracked, and require replacement. CAUTION To prevent damage to the wiper arms or other components, do not attempt to move th ...

General Information
General Troubleshooting Information Before Troubleshooting 1. Check applicable fuses in the appropriate fuse/relay box. 2. Check the batter ...