2008 Honda P0440: What It Means & Is It Safe to Drive?
P0440 on the 2008 Honda: Evaporative Emission System Control System Malfunction. 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
A general fault in the EVAP system—could be a leak, stuck valve, or sensor issue.
Common causes on the 2008 Honda
- 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 2008 Honda, repairs for P0440 typically fall between $20 and $400, depending on the root cause and labor rates in your area.
Known issues on Honda
Honda EVAP systems are sensitive to gas cap sealing. If the cap is confirmed good, the purge valve solenoid mounted on the intake manifold is the most common P0440 cause on older Civics and Accords. It's inexpensive and straightforward to replace.
Most commonly affected models
Accord 2003–2007CR-V 2002–2006Civic 2001–2005