New Owner, New problem... - Page 2 - Jeep Commander Forums: Jeep Commander Forum
Problems / Dealer Service Having a problem with your vehicle? Were you treated fairly or poorly at a dealer? Warranty issues? Let us know.

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post #11 of 18 (permalink) Old 07-16-2019, 06:07 PM
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I'm confused... I already said the leak is at the leak detection pump from a smoke test in the post you quoted.

I do have a code reader.
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post #12 of 18 (permalink) Old 07-16-2019, 06:22 PM Thread Starter
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Roger that.... What I get for skimming on my phone.
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post #13 of 18 (permalink) Old 08-25-2019, 06:44 PM
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LooseCannon - Did you fix your issue?

I figured out Jeep calls that first item you pictured the "ESIM" while Rock Auto calls it the "Leak detection pump."
Before I had mine smoke tested, I also had a crack in the charcoal canister that I fixed with epoxy. Thanks to the results of the smoke test, I bought a new ESIM or whatever you want to call it, and the replacement fit much tighter.
Code hasn't been back yet, so I hope I fixed my issue.

I would not, however, throw the parts cannon at this issue without doing some diag yourself and possibly doing/having a shop do a smoke test.
Also make sure you have vacuum at the side of the purge valve going back to the tank.

EDIT: Just as an FYI, the "ESIM" seems to have two settings: vent to atmospheric or sealed. Mine seems to have failed open, producing the large evap leak and "check gas cap" message.
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Last edited by Aerogt01; 08-25-2019 at 06:47 PM.
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post #14 of 18 (permalink) Old 08-26-2019, 08:10 PM
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Originally Posted by LooseCannon View Post
Sounds like you have a leak in the evap system somewhere based on those codes.... you replace the gas cap and clear the code? You can clear the code without an OBD scanner by disconnecting both battery terminals and touching them together for about 15 seconds.
I can see taking both battery terminals off - but I don't think holding the 2 terminals together for 15 seconds is a very good idea at all.

I wouldn't recommend that solution to anybody @LooseCannon, even though it may have worked for you; It's probably best to buy an OBD-II scanner of some sort and clear the codes properly. In this day & age, there are quite few OBD-II scanners on the market that are cheap enough.
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Last edited by Big Blue; 08-26-2019 at 09:28 PM.
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post #15 of 18 (permalink) Old 08-27-2019, 09:46 AM
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Blue, while I will echo your comment I don't specifically recommend it, this is actually a common technique with electronics to quickly discharge the capacitors before opening things like CRT monitors or power supplies. But again, I cannot promise it won't harm vehicle electronics.

To add a little bit of safety to this method, you could disconnect the positive terminal, then turn all you interior lights on. It would still be a path to ground, but there's some resistance. Click them back off after a minute, connect the battery, and Bob's your uncle.
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post #16 of 18 (permalink) Old 09-11-2019, 04:34 PM
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Excellent, thank you, those posts are right on point. I will also search the forum myself ó I didnít mean to make you look for me.

I just found the Tapatalk app today and am using for this forum ó very convenient!


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post #17 of 18 (permalink) Old 09-11-2019, 04:40 PM
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Excellent, thank you, those posts are right on point. I will also search the forum myself — I didn’t mean to make you look for me.

I just found the Tapatalk app today and am using for this forum — very convenient!


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CJC; you're new here, so it's understandable.

I don't mind doing some of the leg work to get folks pointed in the right direction.


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post #18 of 18 (permalink) Old 09-15-2019, 12:27 PM
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Originally Posted by CaptainJeepCommando View Post
Excellent, thank you, those posts are right on point. I will also search the forum myself ó I didnít mean to make you look for me.

I just found the Tapatalk app today and am using for this forum ó very convenient!


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I use tatatalk also. I like it for the most part, but I canít see the left side bar details to know details on what Jeep people have. I probably need to change some settings.


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