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2003 FORD THUNDERBIRD
3.9L DOHC V8 (280 hp)•FWD•AUTOMATIC•gas
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Repairs0Labor974Torque985Fluid14DTC1902Battery2Maintenance0Recalls0
P1451low severityPowertrain

EVAP Control System Canister Vent Solenoid Circuit Malfunction

on 2003 Ford Thunderbird 3.9L DOHC V8 (280 hp) · FWD

What this code means

The canister vent solenoid circuit has an electrical malfunction. This solenoid controls the fresh air vent on the charcoal canister.

Symptoms

  • Check Engine Light
  • EVAP system unable to run leak test
  • Failed emissions test

Common causes

  • Faulty canister vent solenoid
  • Wiring issue to vent solenoid
  • Corroded connector
  • PCM driver failure

Diagnostic steps

  1. Test canister vent solenoid resistance
  2. Inspect wiring and connector
  3. Command solenoid with scan tool
  4. Check PCM output circuit

Repair notes

Replace canister vent solenoid if faulty. Repair wiring.

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