I would check the gas cap for correct sealing.
Here's a link to your code.maybe try to reinstall the gas cap, http://www.obd-codes.com/p0455
SOURCE: 2002 Hyundai Elantra Check Engine
the error was resolved in the link below, please check the last post of Sith.
http://www.hyundai-forums.com/t28310-1997-elantra-code-p0455-help.htm
hope this will help you resolve th issue you have too.
SOURCE: What is the trouble code p1684, and p0455.
1684 is 'battery disconnected in last 50 starts' and should shut off after you have used it for 50 more.
0455 is 'Evaporative emission control system leak detected (gross leak)
SOURCE: 2006 kia rio check engine light on and code P0455
A code p0455 most likely means one or more of the following has happened:
With a p0455, the most common repair is to:
SOURCE: 2006 kia rio check engine light on and code P0455
A code p0455 most likely means one or more of the following has happened:
With a p0455, the most common repair is to:
SOURCE: check engine light ...code came
This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.
Symptoms: You likely won't notice any drivability problems.
Causes: A code p0455 most likely means one or more of the following has happened:
* A loose or improperly affixed gas cap
* A non-conforming gas cap (i.e. not factory/original brand)
* Other leak or damaged piece in EVAP system
Possible Solutions: With a p0455, the most common repair is to:
* Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
* Otherwise, replace the gas cap, and/or
* Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary
Hope this helps (remember to rate thsi answer).
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