EVAP evaporative emissions systems monitoring
This system includes the on-board refueling vapor recovery (OVRV) system with leak detection (LDP) pump.
The ORVR system filters fuel vapor through the EVAP canister to prevent vapor escaping directly into the atmosphere.
The engine Control Module (ECM) determines when appropriate conditions are met and activates the LDP to pump a small amount of air pressure into the fuel tank and lines. The pump runs until a pre-determined pressure or time is reached. If the system does not hold the pressure, a fault or DTC is stored in the ECM.
The area this is located is behind the right plastic rear wheel liner cover. You will see the fuel filler neck from there and the rest of the EVAP system. Visual check for cracks on all the hoses specially the hose clamps. There are 3 lines connected to the Activated charcoal canister (EVAP canister fastened to body) that are detachable and use O-rings for secured sealing. Check if O-rings, if damaged, replace.
Check your gas cap. Is it on tight? Is the gasket cracked? If the gascap is okay, proceed to Ed's advice.
Evaporative Emission Control System Leak Detected (no purge flow or large leak)
What does that mean?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.
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SymptomsYou likely won't notice any drivability problems.
CausesA code p0455 most likely means one or more of the following has happened:
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