DTC P0442: EVAP Control System Leak Detected (Small Leak)

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

P0442 - EVAP CONTROL SYSTEM LEAK DETECTED (SMALL LEAK)

Description:	The PCM monitors the complete EVAP control system for the presence of a small fuel vapor leak. System failure occurs when a fuel vapor leak from an opening as small as 1.016 mm (0.040 in) is detected by the EVAP running loss monitor test.
Possible Causes:	After market EVAP hardware (such as fuel filler cap) non-conforming to required specifications. Small holes or cuts in the fuel vapor hoses/tubes. Canister vent solenoid stays partially open on closed command. Damaged, missing or loosely installed fuel filler cap. Loose fuel vapor hose/tube connections to the EVAP system components. EVAP system component seals leaking (EVAP canister purge valve, fuel tank pressure sensor, canister vent solenoid, fuel vapor control valve tube assembly or fuel vapor vent valve assembly).
Diagnostic Aids:	Check for a missing fuel filler cap or the integrity of the cap. Check for loose or damaged vapor hoses. The evaporative emission system tester may be used to carry out the leak verification pressure test and leak detection smoke test.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	-	-	GO to Pinpoint Test HX .