![]() Here are the most common problems that will throw the code, presented in order (somewhat) from most to least likely: If your Cherokee has warned you at all in the last few months that the fuel cap was off when it wasn’t, then replacing it would be a great first step. There are many things that can cause the P0457 trouble code to trigger in your Jeep Cherokee. The EVAP system deals with fuel vapor, and not the running of the engine in your Cherokee. But, it won’t affect the way the engine itself runs. ![]() If these vapors are leaking 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. P0457 code will typically not be accompanied by any noticeable symptoms other than the smell of gas and the service engine soon light. When there is a leak in the Jeep Cherokee’s EVAP system, it will throw the P0457 OBDII Code. The EVAP system captures all fuel vapor from the fuel tank and sends them to the engines intake in order to be ignited in the normal combustion process. System Leak – Evaporative Emission System This means that regardless of which make or model of vehicle, the code will mean the same thing (Cherokee or not). Certainly anytime the service engine soon light is on though, it’s good to deal with it as soon as possible. P0457 is normally not an immediate threat to the drive-ability of your Cherokee. It is similar to P0455 (large leak) and P0456 (small leak) P0457 Indicates that there is a leak in the Evaporative Emission Control (EVAP) System. This code references a number that is given to you when you plug your Cherokee into a OBDII scanner. P0457 is a somewhat common trouble code with the Jeep Cherokee.
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