![]() You’re looking for the smell of fuel.Ī mechanic has a wide range of instruments to aid in diagnosing the p0455 code in your Jeep Grand Cherokee. Smell around the gas cap, fuel filler neck, EVAP hoses, and anywhere else you can safely get your head. This video is a fantastic resource on how to test your gas cap. Check the seal on your Grand Cherokee’s gas cap.Inspect the EVAP system hoses for a leak.When the fuel filler neck gasket dries out, the fuel tank can’t hold pressure anymore.īefore sending your Grand Cherokee off for a thorough evaluation, you can do a few things. This gasket can dry out, especially with vehicles that spend their time in dry climates. Fuel Filler Neck– There is often a gasket where the fuel filler neck connects with the gas tank.If you are getting that message, plus a P0455, it may save you a ton of time and money to replace the fuel cap and see if it goes away. Often, you’ll get a message informing you that the fuel cap is off even when it is on. Fuel Cap– A bad fuel cap can cause P0455.This can reduce tank pressure and throw the code. ![]()
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