Detection Condition
DTC is set when PCM detects high input voltage from ground side of front HO2S heater circuit after PCM turns HO2S heater circuit on. This is an intermittent monitor. MIL is illuminated when PCM detects malfunction condition in 2 consecutive drive cycles. Pending codes is available if PCM detects malfunction during first drive cycle. Freeze Frame Data is available and DTC will store in PCM memory.