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Crown Victoria, Focus, Grand Marquis, Marauder, Sable, Taurus & Town Car & ZX2

WARNING: This page does not describe the selected car, but rather 31 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.
  1. Testing Evaporative Emission Running Loss System Monitor -  Perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If PCM DTC P0442, P0455, P0456, P1443 or P1450 is retrieved, see EVAPORATIVE EMISSIONS DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article for appropriate test procedure. If any other PCM DTC(s) are retrieved, see DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article for appropriate test procedure. If no PCM DTC(s) are retrieved, go to next step.

  2. Testing Evaporative Emissions Test Port Through Canister Vent Solenoid

    Connect Evaporative Emissions System Leak Tester (134-00056) to test port. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, go to next step. If pressure does not drop immediately, go to HISSING SOUND WHEN REMOVING FUEL CAP .

  3. Testing EVAP System Between Fuel Filler Pipe & Canister Vent Solenoid

    Move EVAP tester to fuel filler pipe. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. On Focus and ZX2, if pressure does not drop immediately, go to HISSING SOUND WHEN REMOVING FUEL CAP . On all other models, if pressure does not drop immediately, replace fuel vapor valve tube assembly. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed.
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