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HOMESERVICE MANUALSFORD2010MUSTANG BASE, 2D COUPE, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - PINPOINT TEST DY: ENGINE OIL TEMPERATURE (EOT) SENSOR THROUGH PINPOINT TEST HE: EXHAUST GAS RECIRCULATION (EGR) SYSTEMS - (EXCEPT DIESEL & HYBRID)PINPOINT TEST H: FUEL CONTROLTEST PROCEDURE
2010 Ford Mustang Base, 2D Coupe, Automatic

Test Procedure

2010 Ford Mustang Base, 2D Coupe, AutomaticSECTION Test Procedure
  1. H1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) 

    Are DTCs P0171, P0172, P0174, P0175, P2195, P2196, P2197, P2198, P2270, P2271, P2272, P2273, P2274, or P2275 present? 

    Yes No
    For DTCs P2270, P2271, P2272, P2273, P2274 or P2275, GO to  H35.
    For DTCs P0171, P0174, P2195 or P2197, GO to  H2.
    For DTCs P0172, P0175, P2196 or P2198, GO to  H8.    		 For all others, GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS .
  2. H2 DTCS P0171, P0174, P2195 OR P2197: LEAN SYSTEM DTCS 
    NOTE: Do not clear the DTCs or reset the keep alive memory (KAM).
    • Access the PCM and record the engine coolant temperature (ECT) PID from the freeze frame data. The freeze frame data is used to recreate the concern.
    • Retrieve and record the self-test DTCs.

    Are any DTCs present other than the following: P0171, P0174, P2195 or P2197? 

    Yes No
    DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS . GO to  H3.
  3. H3 CARRY OUT A VISUAL INSPECTION ON THE INTAKE AIR SYSTEM AND ALL VACUUM HOSES 
    • Ignition OFF.
    • Check the intake air system for leaks, obstructions, and damage.
    • Inspect the entire length of all the vacuum hoses for:
      • correct connections
      • damage or cracks
      • damaged or cracked vacuum tees
    • Verify the integrity of the positive crankcase ventilation (PCV) system.
    • Verify the proper PCV valve part number.

    Is a concern present? 

    Yes No
    GO to  H7. GO to  H4.
  4. H4 CHECK FOR THE PRESENCE OF A VACUUM LEAK 
    NOTE: Fuel trim values at idle are more sensitive to a vacuum leak. The vacuum leak (unmetered air) represents a larger portion of the total air flow at idle than at part throttle.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.