The PCM/ECM monitors front HO2S signal level during fuel cut-off to check plausability. The PCM/ECM sets DTC P2297 if front HO2S signal is out of the predetermined threshold. If the same error code is set in the next driving cycle, the PCM/ECM illuminates the MIL.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Plausability check during fuel cut-off phase | 1. Poor connection or damaged harness 2. Front HO2S |
Enable Conditions |
•
Fuel cut-off
•
Wide range sensor pump current valid
•
Sensor heater controlled heating
•
Exhaust gas temp. > 300℃ (572℉)
•
10V < Battery voltage < 16V | |
Threshold value |
•
Signal < 3.1V | |
Diagnosis Time |
•
6sec. After fuel cut-off | |
MIL On Condition |
•
2 Driving Cycles |
