P2279: Intake Air System Leak
4 vehicles · 4 makes · $50-$3,000 repair
Most Reported On
P2279 is an OBD-II diagnostic trouble code meaning “Intake Air System Leak.” This code means the engine computer detected an air leak in the intake system downstream of the mass airflow sensor (unmetered air entering the engine). Because this air is not measured, the engine may run lean, idle roughly, or behave inconsistently. The computer flags it when fuel trims or airflow readings indicate more air is reaching the cylinders than the sensor accounts for. It is usually not an immediate safety issue but can cause drivability problems, poor fuel economy, and other related lean codes. This code is most commonly reported on 2007-2012 SEAT Leon (Reference, Style, FR), 2009-2017 Volkswagen CC, and 2005-2014 Opel Zafira (Zafira B), plus 1 other vehicle, with repair costs ranging from $50 to $3,000.
Common Causes
Typical Repair Cost
Based on 4 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P2279, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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Vehicles Affected (4)
FAQ
What does P2279 mean?
P2279 stands for "Intake Air System Leak." This code means the engine computer detected an air leak in the intake system downstream of the mass airflow sensor (unmetered air entering the engine). Because this air is not measured, the engine may run lean, idle roughly, or behave inconsistently. The computer flags it when fuel trims or airflow readings indicate more air is reaching the cylinders than the sensor accounts for. It is usually not an immediate safety issue but can cause drivability problems, poor fuel economy, and other related lean codes.
What are the most common causes of P2279?
The most common causes of P2279 are: Cracked or loose intake hose / air duct after the MAF, Vacuum leak (hoses, gaskets, PCV), Loose or damaged intake manifold gasket, Faulty or dirty mass airflow sensor, Leaking throttle body gasket, Unseated or cracked intake boot clamp, Failed PCV valve or hose. The specific cause varies by vehicle.
How much does it cost to fix P2279?
Repair costs for P2279 range from $50 to $3,000, depending on the vehicle and root cause.
Which vehicles are affected by P2279?
Au7o has documented P2279 across 4 vehicle models from 4 manufacturers: Audi, Opel, SEAT, Volkswagen.
Sources (5)
- articleEA888 Engine Series — PCV Issues Explained (eEuroparts)
- articleP2279 VW/Audi Fault Code: Diagnosis & Repair (VW Tuning)
- articleDrallklappen Gestänge Reparatursatz für Fehler P2279/P2075 1.9 CDTI — Tuning-Fanatics
- articleZafira B 1.9 CDTI Defekte — MOTOR-TALK (Drallklappen/AGR/DPF)
- TSBAudi TSB 2040644/6 - Warm-Idle Whistle, P2279/P0507 and Crankcase Breather Leak
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.