If the Long Term Fuel Trim(Multiplicative) is higher than the specified value, the ECM/PCM sets DTC P2191.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Monitoring the deviation of long term fuel trim in part load | 1. Air leakage 2. Improper fuel pressure 3. PCV valve stuck 4. Clogging of injector |
Enable Conditions |
•
Engine Coolant Temperature(ECT) > 73°C
•
Part Load Lambda adaptation active conditions : 1150rpm < Engine speed < 4000rpm 0.010g/rev < Mass Fuel Flow(MFF) < 0.066g/rev
•
Low estimated fuel dilution in oil (only for too rich system) | |
Threshold Value |
•
Max Limit = 25% | |
Diagnostic Time |
•
90sec | |
MIL On Condition |
•
2 driving cycles |
