p0442
Moderate
Fiat · Cars
Evaporative Emission Control System Leak (Medium)
Quick Answer
Error code P0442 on your Fiat Cars means: Evaporative Emission Control System Leak (Medium). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Tighten or replace fuel cap
2
Perform detailed smoke test on EVAP system
3
Inspect charcoal canister condition
4
Test purge control valve voltage
5
Identify and seal any medium-sized leaks
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
Purge valve
EVAP hoses
Sealant
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