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I have a 2012 Jeep’s Patriot Sport. Two days ago a “GASCAP” message came on and not too soon after, my check engine light also came on. I checked my gascap and it wouldn’t tighten at all, so I bought a new one and replaced it. The “GASCAP” message is gone, but my check engine light is still on.

I did some research online and it says that it takes a couple driving cycles for the check engine light to go off. My girlfriend and I have driven it a few different times since I replaced the gascap and the check engine light is on every single time.

As far as the check engine light being on, there’s nothing wrong with my Jeep. It drives great. All the fluids are topped off. I just had an oil change and full check up last month and there was nothing wrong with it.

Does anyone have any advice or suggestions? I don’t want to bring it in and end up getting ripped off for something small.
 

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Swing by a parts store and they should scan it for you and tell you the code. Did you buy a Mopar gas cap or an aftermarket? Some of the aftermarket caps don't seem to seal as well as a Mopar one.
 

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2014 2.0 5-spd FWD
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First off, welcome!

Problems like this is why we're all here.

As for your check engine light/code you might try this:

Please keep us posted.
 

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There's a thing you can do where you hold down the wee Journey clock reset button and then turn the ignition to the on position and it does something ... not sure what, but it does something ... all the dials move :)
 

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I have a 2012 Jeep’s Patriot Sport. Two days ago a “GASCAP” message came on and not too soon after, my check engine light also came on. I checked my gascap and it wouldn’t tighten at all, so I bought a new one and replaced it. The “GASCAP” message is gone, but my check engine light is still on.

I did some research online and it says that it takes a couple driving cycles for the check engine light to go off. My girlfriend and I have driven it a few different times since I replaced the gascap and the check engine light is on every single time.

As far as the check engine light being on, there’s nothing wrong with my Jeep. It drives great. All the fluids are topped off. I just had an oil change and full check up last month and there was nothing wrong with it.

Does anyone have any advice or suggestions? I don’t want to bring it in and end up getting ripped off for something small.
Hi aedynrhys,

If the check engine light persists and you decide to take it to your dealership, let us know. We're available via direct message and can help throughout that process.

Jasmine
Jeep Social Care Specialist
 

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2014 2.0 5-spd FWD
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It could be a problem somewhere else in the fuel system and its misreading it and throwing the GASCAP message.

My '08 Patriot was throwing the GASCAP message so I picked up an aftermarket cap. No problems, but . . . it took two men and a boy to get the cap off to fill the tank. After a couple struggles I gave up and went to the dealer and bought a genuine Mopar gascap . . . but now I get the GASCAP message again. So I'm living with the stupid message and come inspection time (November) I'll put the aftermarket cap back on so it passes.
 

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If it ain't broke don't fix it

Check engine light is a revenue maker for someone else.
Disconnect the battery, wait a few minutes and reconnect it.
The light will clear. Wait a couple of weeks of normal driving and see whatssup?
Go from there. Keep your money.
Chief
 

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I have a 2012 Jeep’s Patriot Sport. Two days ago a “GASCAP” message came on and not too soon after, my check engine light also came on. I checked my gascap and it wouldn’t tighten at all, so I bought a new one and replaced it. The “GASCAP” message is gone, but my check engine light is still on.

I did some research online and it says that it takes a couple driving cycles for the check engine light to go off. My girlfriend and I have driven it a few different times since I replaced the gascap and the check engine light is on every single time.

As far as the check engine light being on, there’s nothing wrong with my Jeep. It drives great. All the fluids are topped off. I just had an oil change and full check up last month and there was nothing wrong with it.

Does anyone have any advice or suggestions? I don’t want to bring it in and end up getting ripped off for something small.
Get that checked out ASAP it happened to my 2011 Patriot went to the shop put a code reader on it it threw a p0420 that is a potential bad catalytic converter have a shop performer pressure test it may be leaking but that p0420 code is pending right now which means I have to cycle my car on about 40 times the mechanic said and it will thoroughly diagnose the problem if it doesn't throw the code again then it was just registering something maybe in bad gas or something definitely get it checked out because now I'm sure I have to replace my catalytic converter they cost $1,500 just to start
 

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Jeep Patriot MK74 2.4 FWD
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I found an interesting video on this topic, it is in Russian, if anyone needs it, I will translate it.
 

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In fact, the problem may be air leakage in the intake manifold, it is necessary to replace the gasket.
 
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