DTC P0030: Ho2S Heater Control Circuit Sensor 1: Description

The Heated Oxygen Sensor (HO2S) heater is a device used to reduce the time that the sensor takes to go active. The PCM uses a high side driver to apply ignition voltage to bank 1 sensor 1 heater, and a low side driver Output Driver Module (ODM) to supply the ground path. The PCM monitors the high side driver for circuit conditions that are incorrect for the commanded state of the driver. If the PCM detects an improper circuit condition in the high side driver, Diagnostic Trouble Code (DTC) P0030 will set.