The Quick Answer above is the generic definition. What follows is the model-specific detail for the Volkswagen models that log P0442.
DTC/P0442·Volkswagen
P0442 on Volkswagen: Causes, Symptoms and Fix Cost
Quick Answer
Low SeveritySafe to drive (short-term)Volkswagen
P0442 on a Volkswagen means the engine control unit has detected a small leak in the evaporative emission control system. This system captures fuel vapours from the tank and routes them to the engine to be burned. A small leak allows vapours to escape, increasing hydrocarbon emissions.
Typical repair cost, all makes€10 - €450
Connect any standard Bluetooth OBD2 adapter to your Volkswagen and Skanyx tells you what P0442 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 P0442 mean on a Volkswagen?
Volkswagen Golf
2003-2024On Golfs with leak-detection hardware, a sticking N80 purge valve can trigger P0442, and the EVAP hoses routed under the car near the fuel tank are exposed to road debris. Make sure the fuel cap is turned until it clicks. Many European-market cars are built to EU on-board diagnostic rules, which only require the purge valve circuit to be checked rather than the system to be tested for leaks, so check that your car actually has leak-detection hardware before chasing this code.
What causes P0442 on a Volkswagen?
Beyond the generic causes listed on the main P0442 page, these are the patterns noted for Volkswagen models:
Volkswagen GolfN80 purge valve sticking open or closed
Volkswagen GolfEVAP hose damage from road debris under the vehicle
How to diagnose P0442 on a Volkswagen with OBD2
Follow these steps to pinpoint the root cause of P0442:
- Check the fuel cap first. Remove it, inspect the rubber seal for cracks or debris, and re-seat it until it clicks. Clear the code and drive for a few days to see if it returns
- Visually inspect all EVAP hoses from the fuel tank to the charcoal canister and from the canister to the purge valve at the engine. Look for cracks, loose clamps, or disconnections
- Perform a smoke test on the EVAP system by sealing the system and introducing smoke. Watch for smoke escaping at hose connections, the canister, or the fuel tank area
- Test the purge valve and vent valve by commanding them open and closed with a diagnostic tool that supports actuator tests (on many cars this needs manufacturer-level software, not a generic OBD2 reader). A stuck-open purge valve can allow ambient air into the system, mimicking a leak
- If the smoke test reveals no external leaks, inspect the charcoal canister for cracks and the fuel tank for damage, particularly around the fuel pump module seal
How much does P0442 cost to fix on a Volkswagen? (EUR)
Estimated repair costs for P0442 in EUR, compiled across makes. Expect Volkswagen parts and labour towards the upper end of each range.
Prices estimated as of March 2026. Costs vary by region, vehicle, and shop.
Codes related to P0442
These codes are often seen alongside P0442 or point to related issues, on any make:
Looking for the full P0442 reference (all makes, full diagnosis flow, complete repair cost matrix)?
See the main P0442 guideSkanyx · Volkswagen
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