P2279 on SEAT
Intake Air System Leak
P2279 on SEAT vehicles indicates intake air system leak. Au7o has documented this code across 1 SEAT model — most commonly on Leon. 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. Typical repair costs on SEAT range from $700 to $3,000, depending on the specific model and root cause.
Common Causes of P2279
- •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
P2279 on SEAT by Model
SEAT Leon(1 issue)
- Leon Mk2 1.4 TSI Twincharger Timing Chain + Supercharger2007-2012
The CAVD 1.4 TSI Twincharger (supercharger + turbo) in Leon Mk2 / Golf Mk6 / Scirocco / Touran is double-trouble: the EA111 timing-chain stretch issue AND supercharger magnetic-clutch failure. Combined repair if both fail is among the most expensive on the platform.
Looking for P2279 on a different make?
View P2279 across all makes →Frequently Asked Questions
What does P2279 mean on SEAT?▼
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. On SEAT specifically, this code is documented across 1 model.
What causes P2279 on SEAT vehicles?▼
Common causes on SEAT: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2279 on a SEAT?▼
Repair costs on SEAT range from $700 to $3,000, depending on the specific model and root cause.
Which SEAT models have P2279 documented?▼
Au7o has documented P2279 on 1 SEAT model: Leon.