Code
P0442
Evaporative emissions
Small leak in EVAP system
A small leak is detected in the fuel vapor recovery system.
Advertisement
Most likely causes
- Loose or faulty fuel cap
- Small EVAP line leak
- Faulty purge valve
Symptoms you may notice
- Check engine light
- Usually no drivability symptom
Checks to run
- Tighten the fuel cap and clear the code
- Smoke test the EVAP system
Tools you may need
Smoke machine
OBD-II scanner
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.