P043F
EVAP System Leak Detection Reference Orifice High Flow
During the leak-detection self-test, airflow through the reference orifice is above the expected rate — typically a leak around the orifice or a damaged seal.
During the leak-detection self-test, airflow through the reference orifice is above the expected rate — typically a leak around the orifice or a damaged seal.
Common causes
- high
Leak at orifice or seal
One of the most commonly reported causes for this code — check this first.
Typical part cost: $90-660
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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 P043F mean?
P043F means "EVAP System Leak Detection Reference Orifice High Flow". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P043F?
leak at orifice or seal — 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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