2017 Ram P0442: What It Means & Is It Safe to Drive?
P0442 on the 2017 Ram: Evaporative Emission System Leak Detected (Small Leak). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe 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 on the 2017 Ram
- 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 2017 Ram, repairs for P0442 typically fall between $15 and $300, depending on the root cause and labor rates in your area.
Known issues on Ram
Ram P0442 is commonly a gas cap issue or a small EVAP hose crack. On Ram 2500 with the Cummins diesel, a EVAP system architecture difference can make P0442 less common—verify the code is not a false set from a diesel-incompatible scan tool.
Most commonly affected models
Ram 1500 2009–2018Ram 2500 2010–2018