P0442: EVAP System Small Leak Detected
Severity: Low
What it means
The system that traps fuel vapors has a small leak.
Common symptoms
- Check engine light only
- Occasional fuel smell
Common causes
- Loose or worn gas cap
- Cracked EVAP hose
- Faulty purge or vent valve
What to check first
- Tighten or replace the gas cap first
- Inspect hoses near the fuel tank and engine
Causes vary by vehicle. Confirm with testing before replacing parts.
Not sure which one it is?
Describe what your car is doing in plain English. Our AI will ask simple questions and walk you through it — no scanner needed.
Talk it through with AI — free