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
Removal and installation 1. Disconnect the battery negative terminal first, then the positive terminal. Tightening torque (+) ...

ETC (Electronic Throttle Control) System. Troubleshooting
Fail-Safe Mode Item Fail-Safe ETC Motor Throttle valve stuck at 7° TPS TPS 1 fault ECM looks at TPS2 ...

Specifications
Specifications Items Specifications Rated voltage DC +5V Load Max. 1.5mA (When head lamp lighting) I ...