EVAP System Leak Detected (Small Leak)
Powertrain Code · Low
What does P0442 mean?
A small leak has been detected in the EVAP system. Common causes include a loose or cracked gas cap, cracked EVAP hose, or faulty purge/vent valve.
System: EVAP System
P0442 is a powertrain diagnostic trouble code indicating evap system leak detected (small leak). This code is classified as low severity, which means: minor issue — monitor and fix at convenience. We have vehicle-specific diagnostic data for 50 models below. Select your vehicle for tailored causes, symptoms, and repair cost estimates.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your vehicle.
See causes, symptoms, and repair costs for P0442 on specific vehicles: