ECM/PCM sets DTC P2191 if ECM/PCM monitors and detects fuel adaptation value is higher than specifications while vehicle is not in idle condition.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Additive Long Term Fuel Trim upper limit reached | 1. Air leakage 2. Improper fuel pressure 3. PCV valve stuck 4. Clogging of injector |
Enable Conditions |
•
Coolant temperature is higher than 80.3℃
•
Intake air temperature is lower than 80.3℃
•
Throttle angle is lower than 60%
•
Lambda feed back control condition - active
•
Purge valve control duty = 0%
•
No MAP sensor error
•
No purge valve error
•
No WTS error
•
Engine speed is lower than 920rpm
•
Air mass is lower than 24kg/h | |
Threshold Value |
•
Long Term Fuel Trim (multiplicative) higher than 1.24 | |
Diagnostic Time |
•
10 sec. | |
MIL On Condition |
•
3 Driving Cycles |
