Free DTC page
P0442: Small EVAP System Leak
The EVAP system is leaking slightly during the onboard leak test.
Common causes
- Gas cap seal
- Small hose crack
- Vent valve leak
- Purge valve not sealing
This free page explains the code. A Shop Brief adapts the next steps to your year, make, model, and full code stack.
Related codes:
P0455P0401P0128 Pricing Sample brief