The PCM monitors the fuel trim values at idle during predetermined driving enable conditions. If the average long term or short term fuel trims exceed the determined limit over a certain period of time, PCM sets DTC P2188.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Monitor the fuel trim value at idle | 1. Restriction in intake system 2. Fuel injector leakage 3. Improper fuel pressure |
Enable Conditions |
•
Engine at operating temperature
•
Engine running at Idle for over 5 minutes
•
Engine coolant temperature between 60°C (140°F) 115°C (239°F)
•
No disabling faults (DTCs related to HO2S, purge valve, catalyst ) | |
Threshold value |
•
Average of short term fuel trim less than 1.5 and Average of long term fuel trim less than 0.76 | |
Diagnosis Time |
•
Continuous | |
MIL On Condition |
•
3 Driving Cycles |
