Honda Car Forum

I have a 2000 Honda Civic. It failed the state emission test today. Ironically on the way to the test facility the check engine light came on. The code the testing facility gave to me (reason why it failed) was P1456.Researching this code it came back to "leak detected in EVAP control system." Evaporator canister purge system leak detected.Does anyone know how to repair this? I would rather fix this myself then spending bank by taking the car to the dealer.

Inspect your hoses that go to the evap cannister. One of them may of come off. Your car is still fairly new so they shouldn't be cracked at brittle at this point.

check that none of the rubber or metal lines have rusted or cracked and that they are all connected from the fuel tank to the engine compartment and make sure your fuel cap seal is good and not leaking as well

Could be something as simple as a loose fuel cap. My wife didn't tighten the fuel cap one time and I got the same code. A leak test later and $75 out of pocket, no leak found, cap put on tight, and no problem since. Arggh! My suggestion, if the car is running fine otherwise, make sure the cap is on tight, check for a loose hose around the evap canister, and drive for three hot/cold cycles. If light goes off, no prob. If stays on, take to mechanic.

trace to a vacuume leak follow the canidter chack for bad canister or cracked or bad hose johnson-johnj@yahoo.com jj.kustoms

I use to have Honda's come in all the time with that code. 9 times out of 10 the customer did not tighten the fuel cap good enough. Reset the code and retest.