P0442 Chevrolet Trax
EVAP System Leak Detected (Small Leak) · Powertrain Code · Low · Repair: Easy
What is P0442?
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.
When the Chevrolet Trax triggers code P0442 (evap system leak detected (small leak)), it typically points to an issue in the powertrain system. Below you'll find the most common causes, symptoms, and repair options specific to the Chevrolet Trax.
This repair is rated easy, meaning basic tools, no lift needed.
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 Chevrolet Trax.
Common Causes on Chevrolet Trax
- Loose or damaged gas cap seal
- EVAP purge solenoid not sealing completely
- EVAP vent valve stuck partially open
- Cracked EVAP hose from heat exposure near exhaust
- Fuel tank seal deterioration
Symptoms
- Check engine light illuminated
- Faint fuel smell near vehicle
- Slightly reduced fuel economy
- Failed emissions test
- Occasional rough idle after refueling
Notes for Chevrolet Trax
Trax and Encore GX compact SUVs have shorter EVAP line runs making leak isolation easier during smoke testing.