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![]() While the trouble code may state that there is a “small leak” in the EVAP system of your Jeep Grand Cherokee, it is actually referring to the amount of pressure lost, and not the physical size of the leak. Certainly anytime the service engine soon light is on, it’s good to deal with it as soon as possible. P0456 is normally not an immediate threat to the drive-ability of your Grand Cherokee. It often appears with, or is related other codes, such as P0420, P0441, and very often P0440. P0456 Indicates that there is a small leak in the evaporative emission control system. This trouble code references a number that is given to you when you plug your Grand Cherokee into a OBDII scanner. One of the most common trouble codes with the Jeep Grand Cherokee is the P0456 code.
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