Audi P0442 Code — EVAP System Small Leak Detected
The P0442 code on your Audi indicates a small leak in the EVAP (Evaporative Emission Control) system.
What It Means
The EVAP system prevents fuel vapors from escaping.
👉 If there’s a leak:
- the system loses pressure
- emissions increase
- error codes appear
Common Causes
1. Loose Gas Cap
7
Most common and easiest fix.
2. Damaged EVAP Hoses
8
Causes:
- cracks
- wear
- aging
3. Faulty Purge Valve
- stuck
- malfunctioning
4. Charcoal Canister Issues
- damage
- blockage
Symptoms
- check engine light
- fuel smell
- sometimes no noticeable symptoms
Step-by-Step Fix
- Check gas cap
- Inspect hoses
- Test purge valve
- Scan OBD2 codes
- Perform smoke test if needed
Can You Drive?
✅ Yes
👉 but it’s better to fix it to avoid future issues
FAQ
Is error P0442 dangerous?
No, but it affects the environment and can hide other problems.
How much does the repair cost?
From $0 to $150