2018 Jeep P0455: What It Means & Is It Safe to Drive?
P0455 on the 2018 Jeep: Evaporative Emission System Leak Detected (Large Leak). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
PowertrainMedium urgency
What this code means
A large leak has been detected in the EVAP system. Could be gas cap left off, disconnected hose, or damaged canister.
Common causes on the 2018 Jeep
- Gas cap missing or not sealed
- Disconnected or ruptured EVAP hose
- Damaged charcoal canister
- Faulty purge/vent solenoid
Symptoms
- Check Engine Light
- Fuel smell possible
Typical fixes
- Install or replace gas cap
- Inspect and repair EVAP hoses
- Replace canister or valves as needed
Repair cost range
For a 2018 Jeep, repairs for P0455 typically fall between $20 and $500, depending on the root cause and labor rates in your area.
Known issues on Jeep
Jeep P0455 on Wrangler and Grand Cherokee is frequently a gas cap issue or a cracked large EVAP line. Wrangler's EVAP system routing exposes hoses to off-road impacts—physically trace all lines before using a smoke tester.
Most commonly affected models
Grand Cherokee 2005–2014Liberty 2002–2012Wrangler 2007–2018