The PCM monitors front HO2S signal level during fuel cut-off to check plausability. The PCM 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 illuminates the MIL.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Plausibility check during fuel cut off | 1. Poor Connector Connection 2. Defected Upstream O2 Sensor |
Enable Conditions |
•
Fuel cut off active
•
Sensor pump current valid
•
Sensor heater control : normal heating
•
Exhaust gas Temp. higher than 572℉(300℃)
•
Battery voltage higher than 11V and lower than 16V | |
Threshold value |
•
Upstream O2 sensor voltage higher than or equal to 2.1V and lower than 3.1V | |
Diagnosis Time |
•
6 sec. | |
MIL On Condition |
•
2 Driving Cycle |
