LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 751 (Engine Controls - Diagnostic Methods - CNG, Flex-Fuel & Gasoline) >> Adaptive Fuel DTCs Diagnostic Techniques >> P0172/P0175 System Too Rich Diagnostic Aids >> Notes

P0172/P0175 System Too Rich Diagnostic Aids: Notes

WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2004 Mercury Sable, 2004 Mercury Mountaineer, 2004 Mercury Monterey, 2004 Mercury Marauder, and 2004 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If the system is rich at certain conditions, then the LONGFT PID would be a negative value at that airflow, indicating that decreased fuel is needed.

System rich concerns are usually caused by fuel system concerns, although the MAF sensor, and base engine (for example, engine oil contaminated with fuel) should also be checked.

scientia non olet · About LEMON Manuals