P0442Severity: Low
P0442 – EVAP System Small Leak
There is a small leak in the evaporative emissions (EVAP) system.
What it means
A small leak is detected in the EVAP system that captures fuel vapor. The most common cause is a loose or faulty fuel cap.
Symptoms
- Check-engine light
- Occasional fuel smell
- No noticeable driving effect
Common causes
- Loose/faulty fuel cap
- Small hose crack
- Faulty purge/vent valve
- Canister leak
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Frequently asked questions
What does trouble code P0442 mean?
P0442 – EVAP System Small Leak. A small leak is detected in the EVAP system that captures fuel vapor. The most common cause is a loose or faulty fuel cap.
Can I drive with a P0442 code?
It's usually not urgent, but finding and fixing the cause matters for emissions and fuel economy.