Diagnostic Trouble Code
P0442 — EVAP Emission Control System Leak Detected (Small)
EVAP Emission Control System Leak Detected (Small)
Definition
A small leak (less than 0.040" diameter) has been detected in the EVAP system. The ECM performs a leak test by sealing the system and monitoring pressure decay.
Common Causes
- Loose or cracked gas cap
- Small crack in an EVAP hose or fitting
- Faulty purge or vent solenoid with minor leak-through
- Hairline crack in charcoal canister or fuel tank