Fuel System DTCS

2009 Lincoln Town Car Signature Limited, 4.6 VSECTION Fuel System DTCS
EVAPORATIVE EMISSION (EVAP) SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC Description Perform Test
P0446 Evaporative Emission System Vent Control Circuit Go to Pinpoint Test A  under PINPOINT TEST .
P0451 Evaporative Emission System Pressure Sensor/Switch Range/Performance Go to Pinpoint Test A  under PINPOINT TEST .
P0452 Evaporative Emission System Pressure Sensor/Switch Low Go to Pinpoint Test A  under PINPOINT TEST .
P0453 Evaporative Emission System Pressure Sensor/Switch High Go to Pinpoint Test A  under PINPOINT TEST .
P0454 Evaporative Emission System Pressure Sensor/Switch Intermittent Go to Pinpoint Test A  under PINPOINT TEST .
P1443 Evaporative Emission System Control Valve (Low/No Flow) Go to Pinpoint Test A  under PINPOINT TEST .
P1450 Unable to Bleed up Fuel Tank Vacuum Go to Pinpoint Test A  under PINPOINT TEST .
P1451 Evaporative Emission System Vent Control Circuit Go to Pinpoint Test A  under PINPOINT TEST .
P260F Emission System Monitoring Processor Performance Go to Pinpoint Test A  under PINPOINT TEST .
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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.