Emissions
Code P0442
EVAP System Small Leak Detected
Plain English Meaning:A small leak in the fuel vapor system is detected
✅
Green: Safe to Drive
This is usually not dangerous but should be fixed
What You'll Notice (Symptoms)
- •Check engine light fuel smell sometimes
Most Common Causes
1Loose gas cap cracked hoses faulty purge valve
Verified Repair Playbook
Required Mechanic Tests
A qualified shop should perform these tests before replacing any parts to ensure they aren't guessing:
Smoke test EVAP system inspect gas cap and lines
Typical Fix Paths & Estimated Costs
Tighten or replace gas cap fix hoses $20–$300
🛒 Parts for P0442 Repair
Common replacement parts for emissions codes (Paid links)
Paid links — we may earn a commission on purchases. Enter your vehicle make/model on eBay for exact fitment.
🚗 Find P0442 Parts for Your Vehicle
Select your vehicle for exact-fit emissions parts
↑ Select your vehicle to see exact-fit parts
Fair Pricing Guides
Check our database for average parts, labor, and expected repair costs before heading to a mechanic.