Detection Condition

DTC is set when front HO2S signal voltage does not exceed .55 volt for 120 seconds after monitoring conditions are met.

Monitoring Conditions

• Drive Mode 3 - HO2S, HO2S heater & TWC repair verification.
• Engine coolant temperature has reached more than 158°F (70°C)
• Engine speed is more than 1500 RPM.

This is a Continuous Monitor (CM). MIL illuminates if PCM detects malfunction condition in 2 consecutive drive cycles. Pending code is available if PCM detects malfunction condition during first drive cycle. Freeze Frame Data is available and DTC is stored in PCM memory.