P2279 to P2282: intake air leaks
The engine computer has detected an air leak or restriction in the intake system: in general (P2279), between the air filter and the air flow meter (P2280), between the air flow meter and the throttle (P2281), or between the throttle and the intake valves (P2282).
SeverityModerateUsually not urgent today, but it can get worse if left.
Can you keep driving?Drive gently, check it soonWhat does P2279 mean?
The computer knows how much air the engine should be taking in from the air flow meter, the manifold pressure and the throttle position. If the numbers do not agree, air is getting in where it is not measured, or the intake is blocked. A leak after the air flow meter lets in air the computer did not count, so the mixture runs lean and the idle becomes rough; a blocked filter starves the engine. The code's location narrows where to look.
What causes P2279?
- A cracked intake hose or a loose clamp between the air flow meter and the throttle
- A split vacuum hose or a leaking intake manifold gasket
- A crankcase ventilation hose or valve that is cracked or stuck
- A badly clogged air filter, for P2280
- A leaking brake booster hose
What to check first for P2279
- Inspect the intake ducting and clamps from the air filter to the throttle
- Check the air filter's condition
- Have a smoke test done on the intake to find the leak
- Listen for a hiss around the intake with the engine idling
Can you drive with P2279?
Usually you can drive to a workshop. Expect a rough idle or hesitation; if the engine stalls repeatedly, keep the trip short, and do not leave a lean mixture for long, because it can damage the catalytic converter.
Since May 2018 an engine warning light that stays on is a major defect at the MOT, so the car fails until the fault is fixed.
Codes on this page
- P2279Intake Air System Leak
- P2280Air Flow Restriction / Air Leak Between Air Filter and MAF
- P2281Air Leak Between MAF and Throttle Body
- P2282Air Leak Between Throttle Body and Intake Valves
Related codes
Checked on · Rafael Soares
These are the generic meanings every manufacturer shares. Each brand adds its own detail, so your car's handbook, its service information and a qualified mechanic have the last word. OdoKeep has no connection with any manufacturer, and the app does not read codes from the car.
