P2279 on Volkswagen: Causes, Symptoms and Fix Cost
Quick Answer
Safe to drive (short-term)
P2279 on a Volkswagen means the ECU sees more air in the cylinders than the MAF measured, so unmetered air is entering downstream of the sensor and pushing fuel trims positive.
- Severity
- Moderate · Emissions
- Typical repair cost, all makes
- €8-€750
Connect a standard OBD2 adapter (Bluetooth LE on iPhone) to your Volkswagen and Skanyx tells you what P2279 means on that engine, whether it is safe to keep driving, and what the fix should cost. Free on iPhone and Android.
Get Skanyx freeWhat does P2279 mean on a Volkswagen?
The Quick Answer above is the generic definition. What follows is the model-specific detail for the Volkswagen models that log P2279.
Volkswagen Golf 2.0 TSI (EA888 Gen 2)
2008-2014
On the 2.0 TSI (EA888 Gen 2) in the Golf, pull the oil filler cap with the engine idling. If the cap is sucked down hard or the idle changes sharply, the PCV system is leaking. Then check the turbo inlet hose between the MAF and the turbo.
Source: en.wikipedia.org
Sources
- en.wikipedia.org en.wikipedia.org/wiki/Volkswagen_EA888_engine
What causes P2279 on a Volkswagen?
Beyond the generic causes listed on the main P2279 page, these are the patterns noted for Volkswagen models:
Torn PCV diaphragm or failed PCV valve
: Volkswagen Golf 2.0 TSI (EA888 Gen 2)
Cracked turbo inlet elbow or MAF-to-turbo hose
: Volkswagen Golf 2.0 TSI (EA888 Gen 2)
How to diagnose P2279 on a Volkswagen with OBD2
- Scan for all stored codes. P2279 usually shows up with P0171 and/or P0174, which confirm the lean condition.
- Read live fuel trims at idle and at 2500 rpm. Long-term trim strongly positive at idle but close to zero at higher rpm points to a small vacuum leak, because a fixed amount of unmetered air matters far less once total airflow rises.
- Visually inspect the intake boot, flexing it and checking the underside where cracks often hide, plus the clamps at the MAF and throttle body.
- Pull the oil filler cap at idle. If idle changes sharply or the cap sucks down hard, the PCV system needs attention.
- Smoke test the intake tract with an EVAP smoke machine at 0.5 psi (0.035 bar). Escaping smoke pinpoints the leak in minutes.
- With the engine idling, spray carb cleaner or feed propane around suspect joints. An rpm change confirms leak location.
- Inspect intake manifold seams, vacuum ports, and the brake booster hose for cracks, especially on plastic manifolds past 150,000 km.
- Clear the code, drive a full warm-up cycle, and recheck fuel trims to confirm the repair took.
How much does P2279 cost to fix on a Volkswagen? (EUR)
Estimated repair costs for P2279 in EUR, compiled across makes. Expect Volkswagen parts and labour towards the upper end of each range.
| Repair | Parts Cost | Labor Cost | Total Estimate | DIY Difficulty |
|---|---|---|---|---|
| Replace cracked intake boot or hose | €25–€90 | €30–€80 | €55–€170 | Easy |
| Replace PCV valve and associated hoses | €15–€120 | €40–€150 | €55–€270 | Easy |
| Replace intake manifold gasket | €40–€150 | €250–€600 | €290–€750 | Professional |
| Replace vacuum lines or brake booster hose | €10–€60 | €40–€120 | €50–€180 | Easy |
| Replace throttle body gasket | €15–€50 | €80–€180 | €95–€230 | Moderate |
| Replace a missing or damaged oil filler cap | €8–€30 | €0–€20 | €8–€50 | Easy |
Prices estimated as of October 2026. Costs vary by region, vehicle, and shop.
Codes related to P2279
These codes are often seen alongside P2279 or point to related issues, on any make:
Looking for the full P2279 reference (all makes, full diagnosis flow, complete repair cost matrix)? See the main P2279 guide