P1450 – Unable to Bleed Up Fuel Tank Vacuum
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Symptoms
- Hard refueling
- Fuel tank hiss
- Check engine light
Causes
- Blocked vent
- Faulty vent valve
- Canister restriction
Diagnosis
- Inspect vent valve
- Check canister
- Read pressure data
Repair
- Replace vent valve
- Service canister
- Clear blockage