P04ED
EVAP System Large Leak Detected Fresh Air Side
Same as P04EB on the fresh-air side, but with a leak large enough to prevent test build-up. The evaporative system captures fuel vapor from the tank and purges it into intake; leaks or stuck purge valves leak hydrocarbons and cause emissions failures.
Same as P04EB on the fresh-air side, but with a leak large enough to prevent test build-up. The evaporative system captures fuel vapor from the tank and purges it into intake; leaks or stuck purge valves leak hydrocarbons and cause emissions failures.
Common causes
- high
Vent valve stuck open
One of the most commonly reported causes for this code — check this first.
Typical part cost: $90-330
- medium
Hose pulled off or torn
A plausible cause — test and verify before replacing parts.
Typical part cost: $90-330
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P04ED mean?
P04ED means "EVAP System Large Leak Detected Fresh Air Side". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P04ED?
vent valve stuck open; hose pulled off or torn — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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