2013 Honda P0456: What It Means & Is It Safe to Drive?
P0456 on the 2013 Honda: Evaporative Emission System Leak Detected (Very Small Leak). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
PowertrainLow urgency
What this code means
The EVAP system has detected a very small leak—often smaller than P0442. Commonly caused by a loose fuel cap or hairline crack in a hose.
Common causes on the 2013 Honda
- Loose or worn gas cap seal
- Hairline crack in EVAP hoses
- Minor leak at purge or vent valve fittings
Symptoms
- Check Engine Light only
- Usually no noticeable driving symptoms
Typical fixes
- Inspect and replace gas cap if seal is hardened or cracked
- Smoke-test EVAP system to locate tiny leaks
- Repair or replace leaking hoses and fittings
Repair cost range
For a 2013 Honda, repairs for P0456 typically fall between $25 and $350, depending on the root cause and labor rates in your area.
Known issues on Honda
Honda P0456 is frequently caused by a gas cap not sealing due to a worn O-ring. An OEM Honda cap resolves the majority of P0456 codes. If the new cap doesn't fix it, the purge valve solenoid can leak internally and cause a small EVAP leak.
Most commonly affected models
Accord 2003–2007CR-V 2007–2011Civic 2006–2011