p0456
Easy Fix
Ford · Trucks
Evaporative Emission System Very Small Leak Detected
Quick Answer
Error code P0456 on your Ford Trucks means: Evaporative Emission System Very Small Leak Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
F150F150HF150LF150RF250SDF350SDF-150 King Ranch 2024F-150 Lariat 2024F-150 Limited 2024F-150 Platinum 2024F-150 Tremor 2024F-150 XL 2024F-150 XLT 2024F-250 King Ranch 2024F-250 Lariat 2024F-250 XL 2024F-250 XLT 2024F-350 Lariat 2024F-350 Platinum 2024F-350 XL 2024Maverick Lariat 2024Maverick XL 2024Maverick XLT 2024Ranger Lariat 2024Ranger Raptor 2024Ranger XL 2024Ranger XLT 2024MVKRGR
Likely Causes
How to Fix It
1
Inspect and tighten the fuel cap or replace if the seal is damaged
2
Perform a smoke test on the EVAP system to locate the leak
3
Inspect all EVAP hoses and connections for cracks
4
Check the EVAP canister for damage
5
Inspect the fuel filler neck for cracks
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
Fuel cap
EVAP hoses
EVAP canister
Purge valve
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