• Tiny
  • Joe Vargas
  • 2002 Ford Expedition

Computer problem
2002 Ford Expedition V8 Two Wheel Drive Automatic 112000 miles

2002 Ford Expedition/ 112,000 Miles. Receiving trouble code - P1450, which reads "Manufacturer Control Auxiliary Emission Controls". However, the Haynes Repair Manual makes noe mention of this code. Any assistance would be greatly appreciated

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Friday, October 31st, 2008 AT 12:57 AM

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  • Tiny
  • bluelightnin6
  • Expert
  • 17,061 posts

P1450 indicates that the Self-Test has detected the Evaporative Emission Control System has excessive fuel tank vacuum. First thing to do is ensure that the gas cap is on securely. Other possible causes include:

EVAP canister purge outlet tube (EVAP canister purge valve to EVAP canister) blockages or kinks.

EVAP canister tube (fuel tank to EVAP canister) blockages or kinks.

Fuel vapor elbow on EVAP canister contaminated.

Restricted EVAP canister.

Canister vent (CV) solenoid stuck closed (partially or fully).

Plugged or contaminated CV solenoid filter.

EVAP canister purge valve stuck open.

Fuel filler cap stuck closed (no vacuum relief).

VREF circuit open in fuel tank pressure (FTP) sensor.

Damaged FTP sensor.

Check for kinks or bends in the fuel vapor hoses/tubes (EVAP canister purge outlet tube and EVAP canister tube).

Visually inspect EVAP canister inlet port, CV solenoid filter and canister vent hose assembly for contamination or debris.

Check CV solenoid filter for blockage or contamination.

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Friday, October 31st, 2008 AT 1:14 AM

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