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HOMESERVICE MANUALSFORD2005TAURUS SEL, 4D SEDANREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1166 (ENGINE CONTROLS - PINPOINT TESTS - (HYBRID))PINPOINT TEST H: FUEL CONTROLTEST PROCEDURE
2005 Ford Taurus SEL, 4D Sedan

Test Procedure

2005 Ford Taurus SEL, 4D SedanSECTION Test Procedure
WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. H1 DIAGNOSTIC TROUBLE CODES (DTCS) P0171, P0172, P2195, P2196, P2270, AND P2271: CHECK FOR SELF-TEST DTCS 

    Are any of the following DTCs present during PCM or transaxle control module (TCM) self-test: P0171, P0172, P2195, P2196, P2270, or P2271? 

    Yes No
    For DTCs P2270 or P2271, GO to  H18.
    For DTCs P0171 or P2195, GO to  H2.
    For DTCs P0172 or P2196, GO to  H7.    		 For all others, GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS .
  2. H2 DTCS P0171 OR P2195: LEAN SYSTEM DTCS 
    NOTE: Do not clear the DTCs or reset the keep alive memory (KAM).
    • Access the PCM and record the 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 P0171 or P2195? 

    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:
      • proper 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  H6. 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.