If the Long Term Fuel Trim(Multiplicative) is higher than the specified value, the PCM sets DTC P2191.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Multiplicative Long Term FT upper limit reached | 1. Air leakage 2. Improper fuel pressure 3. PCV valve stuck 4. Clogging of injector |
Enable Conditions |
•
Torque greater than 25% and less than 60 %
•
Engine speed greater than 500 rpm
•
ECT greater than 60 ℃(140 °F)
•
IAT less than 80 ℃(176 °F)
•
Fuel System Status : Closed loop
•
Canister purge control off | |
Threshold Value |
•
Long Term Fuel Trim (multiplicative) greater than 1.23 | |
Diagnostic Time |
•
90 sec. | |
MIL On Condition |
•
2 Driving cycle |
