EVAP System Leak Detected (Gross Leak / No Flow)
2007-2007 Ford F-150 4.2L V6
The 2007 Ford F-150 is equipped with a 4.2L V6 engine. Below you'll find detailed p1455 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
The PCM has detected a large leak in the Evaporative Emission Control System, or there is no flow through the system. This indicates a significant breach in the sealed EVAP system.
Symptoms
- Check Engine Light
- Fuel odor
- Poor engine performance possible
- Difficulty refueling
- Failed emissions test
Common Causes
- Loose or damaged gas cap (most common)
- Cracked or disconnected EVAP hoses
- Faulty purge valve
- Damaged charcoal canister
- Fuel tank or filler neck damage
- Missing or damaged EVAP system component
Diagnostic Steps
- Inspect gas cap — tighten or replace
- Visual inspection of all EVAP hoses and connections
- Smoke test EVAP system to locate leak
- Test purge and vent valves
- Inspect charcoal canister
- Check fuel filler neck
Repair Notes
Replace gas cap first (most common). Smoke test to find larger leaks. Replace damaged hoses or components.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1455 on Other Vehicles
Common Questions
What does code P1455 mean on a 2007-2007 Ford F-150?
P1455 stands for "EVAP System Leak Detected (Gross Leak / No Flow)". The PCM has detected a large leak in the Evaporative Emission Control System, or there is no flow through the system. This indicates a significant breach in the sealed EVAP system.
What are the symptoms of P1455 on a Ford F-150?
Common symptoms of P1455 include: Check Engine Light, Fuel odor, Poor engine performance possible, Difficulty refueling, Failed emissions test.
What causes P1455 on a 2007-2007 Ford F-150?
Common causes of P1455 include: Loose or damaged gas cap (most common), Cracked or disconnected EVAP hoses, Faulty purge valve, Damaged charcoal canister, Fuel tank or filler neck damage, Missing or damaged EVAP system component.
Last updated: March 2026
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