Detection Condition
WARNING: This page is about a different car, the 2003 Mazda Protege5 and 2003 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when rear HO2S signal voltage does not exceed .55 volt for 30 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.