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Evap System Hose– The EVAP hose carries fuel vapor from the fuel tank to the intake manifold can begin to leak.

How your Grand Cherokee’s EVAP system works will depend on the model year and engine type. Here are the most common causes of P0455. If these vapors leak from the system, you’ll often smell them faintly while operating the vehicle.

The EVAP system deals directly with fuel vapors. You should particularly notice the smell of fuel around the fuel tank area or fuel filler tube. P0455 code will typically not be accompanied by any noticeable symptoms other than the smell of gas and the service engine soon light. Jeep Grand Cherokee P0455 OBDII Code Symptoms The “large” really refers to how much pressure is lost. While the trouble code may state that there is a “large leak” in the EVAP system of your Jeep Grand Cherokee, the actual leak will most likely still look relatively small. For example, P0456 means your Grand Cherokee has a small EVAP leak. P0455 indicates a large leak in the evaporative emission control system. When there is a large leak in the Jeep Grand Cherokee’s EVAP system, it will throw the P0455 OBDII Code. The EVAP system prevents harmful gases from escaping into the atmosphere and does not affect how the engine runs, which means this code is not a breakdown risk. Your Grand Cherokee’s EVAP system (Evaporative Emission Control System) helps reduce emissions from your vehicle by collecting fuel vapors from the gas tank and sending them back into the engine for combustion. Evaporative Emissions System Purge valves come in many shapes and sizes Repair steps will vary depending on the model year and engine. P0455 is a generic diagnostic trouble code, meaning it has the same definition for your Jeep Grand Cherokee as any other vehicle. P0455 Definition: System Gross Leak – Evaporative Emission System But, whenever the check engine light is on, it’s good to deal with the code as soon as possible.Ĭheck that your Grand Cherokee’s gas cap is present and sealing well. P0455 usually is not an immediate threat to the driveability of your Grand Cherokee.

With this code, you shouldn’t notice any symptoms besides perhaps a noticeable fuel smell. P0455 in the Jeep Grand Cherokee is a trouble code that indicates your truck has a LARGE evaporative emissions leak.