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Fault code P2279 means an air leak in the intake system. The ECU detects that more air is entering than the MAF sensor measures: there is a leak downstream.

Typical symptoms

• Rough idle
• Loss of power
• Rising consumption
• Smoke and abnormal fuel corrections

Most common causes

• Cracked hoses or loose clips
• Leaking manifold gasket
• Crankcase breather hose disconnected
• Leaking intercooler or its pipes
• Throttle body not sealing

How it is checked in diagnosis

• Pressure leak test of the intake (smoke test)
• Reading the fuel corrections
• Visual inspection of the hoses with a hot engine

Can you drive with code P2279?

Yes, but performance and consumption get worse.

How MasterTuning helps

We read the real values from the ECU, not just the code: that is the difference between identifying the component responsible and replacing parts by trial and error. After the repair we clear the fault and check that it does not come back. Centres throughout Italy.

Read more: vehicle database · find an installer · what is ECU remapping

Do you have code P2279 on your car? Book a diagnosis at your nearest MasterTuning centre.

Frequently asked questions

What does fault code P2279 mean?

Code P2279 means an air leak in the intake system. The ECU detects that more air is entering than the MAF sensor measures: there is a leak downstream.

Can you drive with fault P2279?

Yes, but performance and consumption get worse.

Is clearing code P2279 enough to fix it?

No: if the cause is still present the code comes back after a few kilometres. Clearing should only be done after the repair, with the diagnostic tool.

How much does it cost to fix code P2279?

It depends on the component responsible: the diagnosis is precisely what identifies it with real measurements, avoiding unnecessary replacements that cost far more than the correct repair.