10abadilla/jk
New member
Yea it is the oem cap. I'll probably try to reset it by disconnecting the battery. Thank you.
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Gas cap and check engine light?
- Thread starter 10abadilla/jk
- Start date
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10abadilla/jk
New member
Just wanted to say thank you. Everything is good now.
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catahoula
Caught the Bug
If you ever want to replace do not get the Drake cap. It sucks balls. Threw the code more often then not.
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jeeeep
Hooked
Glad it worked out, it'll do it again mine does it about once a year I keep cheap lip balm and some alcohol wipes in the center console. I'm still using the original cap:thumb:
10abadilla/jk
New member
10abadilla/jk
New member
Definitely going to start carrying the same. Thanks again
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10abadilla/jk
New member
Turns out codes finally came up on my jeep. Evap purge system. Where might that be located in the 3.6l I just replaced the evap canister under the jeep like 2 weeks ago and the check engine light came back on stating a loose gas cap and evap purge system.
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Lmoye22
New member
Same thing happened to me yesterday, replaced the canister and it was a gasket near it. You most likely have a leak where the small white box that is attached to the larger black canister.
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10abadilla/jk
New member
So the vacuum pump that is mounted on the canister has a gasket?
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Lmoye22
New member
10abadilla/jk
New member
Same here. When I received my canister and pump it did not come with a gasket. I guess I have to buy one
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Lmoye22
New member
People have used RTV to make a gasket if one isn't available
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10abadilla/jk
New member
There is one available. I found one online. The dealer should be able to get it. It's the leak detection pump gasket on the canister. I'm going to call them Monday and get one.
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ScoobyCarolanNC
Active Member
I thought RTV couldn't be in contact with gasoline because it's a solvent?
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10abadilla/jk
New member
Permatex makes a fuel resistant rtv. And the leak detection pump does not have fuel going through it anyways. Its more of a vacuum I believe. But none the less I would not use rtv when there is a gasket made and available for the pump.
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10abadilla/jk
New member
So I have replaced the evap canister and fuel cap. I am still getting codes p0456 and p0457. Loose fuel cap and evap purge system small leak. I'm not sure what my next step should be. Should I replace the leak detector pump. Or purge solenoid? Could the fuel tank be the part that is leaking. I can't see or smell fuel anywhere by the tank. I'm not sure where to look next
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Last edited:
IMO, you should have the system properly tested and that usually requires a smoke machine. Throwing parts at it will
cost you way more than having someone capable to diagnose and repair it.
10abadilla/jk
New member
So I now have it down to gas cap. Check engine light is on p0456. Gas cap. I have replaced it with an AutoZone one And cleared the code. It came back on. Put the original one back on and lubed it. Cleared code. And it came back on. Is there an aftermarket cap I should invest in. Or should I buy another oem one?
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BaddestCross
Active Member
I don't know about anyone else, but I always seem to have a problem with aftermarket gas caps regardless of the type of vehicle I've had to replace them on. After the last go around, I now always pony up the extra dough on an OEM cap.
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Basscat
Member
Could be a loose hose or bad valve on the EVAP canister? It would likely Throw that same code.
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