What does code P0442 mean on a Lincoln and is it safe to drive?
P0442: Evaporative Emission System Leak Detected (Small Leak). Here's what it means on your Lincoln, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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What this code means
The EVAP system has detected a small leak. Often caused by a loose or faulty gas cap or a small hose leak.
Common causes for your Lincoln
- Loose, damaged, or wrong gas cap
- Cracked or disconnected EVAP hose
- Faulty purge or vent valve
- Leaking charcoal canister
Symptoms
- Check Engine Light
- Often no driveability issues
Typical fixes
- Tighten or replace gas cap
- Smoke test EVAP system
- Replace damaged hoses or valves
Repair cost range
For a Lincoln, repairs for P0442 often fall between $15 and $300, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Lincoln
Lincoln P0442 follows Ford's EVAP patterns. On Navigator with the 5.4L, the fuel filler neck can rust in salt-belt states; on MKZ and MKX, check the EVAP purge solenoid hose connections behind the intake manifold.
Most commonly affected models
MKZ 2006–2012MKX 2007–2015Navigator 2004–2014