In this video will be diagnosing an EVAP system leak on a Jeep Wrangler. p0442 small evap leak, P0445 indicates that there is improper purge flow, EVAP System – Small Leak. One of the most common trouble codes with the Jeep Wrangler is the P0456 code. This trouble code references a number that is given to you when you plug your Wrangler into a OBDII scanner. P0456 Indicates that there is a small leak in the evaporative emission control system.
We did not find any evap leaks in this system and determined the leak detection pump was bad. You can find them on Amazon here:
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3 replies on “P0442 P0445 P0456 EVAP Leak Jeep “Common Problem””
wow, very in-depth explanation!
I have been working on my sister’s Wrangler for the last week trying to figure out what is wrong with the darn thing. I did not even think to check the EVAP system until I read this! I actually came on your site from another link and happened to see this video posted here. Just saved me a lot more trial and error. Trying this first thing in the AM!
I recently bought a Jeep and I will be honest, I know only the bare basics when it comes to cars. My father was a chef and no one in my family had a great interest in cars. I have been trying to find out what was wrong with the jeep since the end of November. Because of the holiday season, I am tight on cash so I didn’t want to take it in unless I absolutely had to. I did the test like you show in the video and sure enough, I have myself a leak! Good news though, my brother’s roommate knows how to fix the issue and will be doing it for me this weekend.