DTC P00D2-00: HO2S Heater Control Circuit Range/Performance Bank 1 Sensor 2: General Description
WARNING: This page is about a different car, the 2025 Kia Soul. However, it is still accessible from the selected car via links, so may be relevant.
The rear heated oxygen sensor is mounted on the rear side of the catalytic converter (Warm up catalytic converter) or in the rear exhaust pipe, which is able to detect catalyst efficiency. The rear heated oxygen sensor (HO2S) produces a voltage between 0V and 1V. This rear heated oxygen sensor is used to estimate the oxygen storage capability. If a catalyst has good conversion properties, the oxygen fluctuations are smoothed by the oxygen storage capacity of the catalyst. If the conversion provided by the catalyst is low due to aging, poisoning or misfiring, then the oxygen fluctuations are similar to signals from the front oxygen sensor.