P0442: Evaporative Emission Control System Leak Detected — Small Leak
System: EVAP · Priority: low
What P0442 means
The control module detected a condition matching the generic definition Evaporative Emission Control System Leak Detected — Small Leak. A trouble code identifies what the module detected; it does not automatically identify the failed part.
Useful next checks
- Inspect the fuel cap and EVAP hoses.
- Use a smoke machine to locate small leaks.
- Check vent and purge valves for sealing problems.
Why vehicle context matters
The same generic code can have different diagnostic paths depending on engine, calibration, wiring layout, service bulletins and related codes. Freeze-frame and live data can help establish when the fault occurred.
Need a scanner for P0442?
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