What does code P0440 mean on a Mitsubishi and is it safe to drive?
P0440: Evaporative Emission System Control System Malfunction. Here's what it means on your Mitsubishi, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
PowertrainLow urgency
What this code means
A general fault in the EVAP system—could be a leak, stuck valve, or sensor issue.
Common causes for your Mitsubishi
- Gas cap loose or faulty
- Purge or vent valve stuck
- Charcoal canister or hose leak
Symptoms
- Check Engine Light
Typical fixes
- Replace gas cap
- Test purge/vent valves
- Smoke test EVAP system
Repair cost range
For a Mitsubishi, repairs for P0440 often fall between $20 and $400, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Mitsubishi
Mitsubishi P0440 EVAP large leak is typically a gas cap seal or a cracked EVAP canister hose. On Outlander, the charcoal canister is mounted under the rear of the vehicle and the hoses can harden and crack from age. Replace the cap first, then inspect canister hose condition.
Most commonly affected models
Outlander 2004–2012Galant 2004–2009Eclipse 2006–2012