Solving P0455 on Your 2016 Ford F-150
A P0455 on your 2016 Ford F-150 means the system found a large EVAP leak. Your 13th-generation F-150—the first with the aluminum body—is out of all warranty coverage. But the most common fix is a gas cap costing under $25. On the F-150, EVAP components sit near the fuel tank under the bed and face road debris exposure.
What You'll Notice
- Check engine light with P0455
- Fuel odor near the bed
- Gas cap seal cracked or worn after 8–10 years
- Emissions test failure
Causes Ranked
- Gas Cap Seal (Very High Likelihood): Worn rubber seal after 8–10 years. $10–$25 OEM Ford replacement.
- Canister Vent Solenoid (Medium Likelihood): Age-related failure, worsened by debris. $140–$260 installed, $40–$70 DIY parts.
- EVAP Hose Deterioration (Medium Likelihood): Cracked or corroded rubber lines. $80–$240.
- VMV (Low Likelihood): Ford purge valve. $100–$220.
- Charcoal Canister (Low Likelihood): Damage or saturation. $200–$400.
DIY Repair Path
Replace the gas cap first ($10–$25). Clear with FORScan or OBD-II scanner. If P0455 returns, the vent solenoid near the fuel tank is a bolt-on replacement with moderate DIY skill. Smoke test at a shop costs $100–$150 for hard-to-find leaks.
No Warranty Coverage
Both Ford's basic warranty and the federal emissions warranty (8yr/80k) have expired for your 2016 F-150. All repairs are out-of-pocket.
Costs
Gas cap: $10–$25. Vent solenoid: $140–$260 shop, $40–$70 DIY. EVAP hose: $80–$240. Most owners spend under $100.
Safe to Drive?
Yes. P0455 doesn't affect any F-150 engine, transmission, 4WD, or towing.