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A positive PID value indicates fuel is being increased to compensate for a lean condition.
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A negative PID value indicates fuel is being reduced to compensate for a rich condition. The LONGFT1 and LONGFT2 PIDs are useful for diagnosing fuel trim concerns. Using the LONGFT1 and LONGFT2 (Dual Bank Engines) PIDs Refer to Freeze Frame Data in this section for a more detailed description of this data. Freeze frame data, in many cases, helps isolate possible areas of concern as well as rule out others. The data (a snapshot of certain PID values recorded at the time the DTC is stored in continuous memory) is helpful to determine how the vehicle was being driven when the concern occurred, and is especially useful on intermittent concerns. For a description of fuel trim, refer to Section 1, Powertrain Control Software, Fuel Trim.įreeze frame data is helpful in duplicating and diagnosing adaptive fuel concerns. These diagnostic aids are meant as a supplement to the pinpoint test steps in Section 5. Before proceeding, attempt to verify if any driveability concerns are present. The Adaptive Fuel DTC Diagnostic Techniques help isolate the root cause of the adaptive fuel concern.
Ford engine codes po138 and p2270 code#
Refer to Section 2, Adaptive Fuel Diagnostic Trouble Code (DTC) Diagnostic Techniques, for additional information and the appropriate pinpoint test for specific concern identification.Īpplication Key On Engine Off Key On Engine Running Continuous MemoryĪdaptive Fuel Diagnostic Trouble Code (DTC) Diagnostic Techniques Intake air turbulence due to incorrect air filterĭiagnostic Aids: View the freeze frame data to determine the operating conditions when the DTC was set. Positive crankcase ventilation (PCV) system is leaking or the valve is stuck open Vacuum hose disconnected on exhaust gas recirculation (EGR) system module (ESM) applicationsĪir leaks after the mass airflow (MAF) sensor (if equipped) Possible Causes: Ethanol content in the fuelĮVAP purge valve is leaking when the canister is cleanĮxhaust leaks in the exhaust manifold gasket or mating gaskets before or near the heated oxygen sensor (HO2S) Refer to Section 1, Powertrain Control Software, Fuel Trim for additional information. This DTC sets when the adaptive fuel tables reach a rich calibrated limit. Description: The adaptive fuel strategy continuously monitors the fuel delivery hardware.