p0442
Moderate
Mazda · Sedans
Evaporative Emission System Leak Detected (small)
Quick Answer
Error code P0442 on your Mazda Sedans means: Evaporative Emission System Leak Detected (small). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Check and replace fuel cap if damaged
2
Inspect EVAP hoses for cracks or separation
3
Test purge control valve operation
4
Perform smoke test to locate leaks
5
Repair or replace faulty components and clear codes
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Fuel cap
EVAP hoses
Purge control valve
Charcoal canister
Related Error Codes