P0455 - EVAP CONTROL SYSTEM LEAK DETECTED ( NO PURGE FLOW OR LARGE LEAK ) possible causes : damaged or missing fuel filler cap / cap not installed correctly after-market EVAP hardware ( such as a fuel filler cap ) not conforming to Ford specs blockages or restrictions in fuel vapor hoses canister vent solenoid stuck open loose fuel vapor hose / tube connections to EVAP system components disconnected or cracked fuel EVAP canister tube , EVAP canister purge outlet tube , or EVAP return tube damaged EVAP canister mechanically inoperative FUEL TANK PRESSURE ( FTP ) SENSOR ( CHECK FOR VACUUM NOISE / FUEL ODOR IN ENGINE COMPARTMENT OR NEAR EVAP CANISTER + FUEL TANK )
Trouble code P0455 means: Evaporative Emission System Leak Detected (gross leak/no flow)
Yes, in most cases a P0455 code will be set.
EVAP Emission Control System Leak (Large)
Large emission vapor leak. Check the gas cap and all lines from the tank to the engine.
Two common causes are loose gas cap and cracked hoses between the tank and engine.
DTC P0455: Evaporative Emission (EVAP) System Large Leak
dtc codes are generic p0455 means "Evaporative Emission Control System Leak Detected (gross leak) " this will cause "check engine light to come on" and is usually that the gas cap is loose and if tighten will cause the check engine light to go away after driving the car for 3 normal driving trips.
Trouble code P0455 means: EVAP System Gross Leak (0.080") Detected
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/orInspect the EVAP system for cuts/holes in tubes/hoses that run from the fuel tank to the engine (you may hear a vacuum noise or smell fuel), repair if necessary
Try the gas cap... Look for any cracked hoses between the fuel tank and engine.
Trouble code P0455 means: EVAP System Large Leak (0.080") Detected
P0455 requires two failures in a row to turn the light on. Pending means that it has failed the large leak test once. Treat it like an active code. P0455 evaporative emissions large leak.