Your Grand Cherokee may display a message indicating that you need to tighten the gas cap even if it doesn’t, the fuel cap is the first thing you should check. Just be aware that the engine may take several cycles to clear the code. So if it’s the first time you have experienced this issue, you may want to tighten the fuel cap and see if the code clears itself. Bad or Loose Gas CapĪ bad or loose gas cap will also trigger this trouble code. The most prevalent issue is undoubtedly the gas cap. Numerous factors can trigger the P0442 error code in the Jeep Grand Cherokee. In rare cases, your Grand Cherokee may have difficulty starting after fueling up, indicating the purge valve is stuck open. You may notice the vague smell of gas near the back of your vehicle, the check engine light will illuminate, and you may or may not have a “ check fuel cap message”.
There are rarely any symptoms related to the P0442 code. P0442 indicates your Grand Cherokee has a minor EVAP leak.
When the Jeep Grand Cherokee’s computer detects that the EVAP system has a leak, it will throw the P0442 code.ĭifferent code numbers represent the leak size. The EVAP system captures all fuel vapor from your vehicle’s fuel tank and sends them to the engine’s intake to be ignited in the normal combustion process. P0442: Evaporative Emission Control System → Leak Detected (Small) Evaporative Emission Control System P0442 is a universal OBD II diagnostic trouble code, applicable across vehicle manufacturers. The most common cause of P0442 is a missing or damaged fuel cap. While it’s unlikely to cause a breakdown, it can be bothersome and may result in a failed emissions test for your Grand Cherokee. This code appears when connecting the vehicle to an OBDII scanner and pertains to the emissions system. One of the most common issues that happens with the Jeep Grand Cherokee is the P0442 trouble code.
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