Diagnosing Adaptive Fuel DTCS: Description
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2003 Mercury Sable, 2003 Mercury Mountaineer, 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
Adaptive fuel DTCs diagnostic techniques help isolate root causes of adaptive fuel concerns. Before proceeding, road test vehicle to verify if any driveability concerns are present. These diagnostic aids are meant as a supplement to system test steps under SYSTEM TESTS . For a description of fuel trim, see FUEL TRIM under POWERTRAIN CONTROL MODULE SOFTWARE under COMPUTERIZED ENGINE CONTROLS in THEORY & OPERATION - CNG, FLEX-FUEL & GASOLINE article.