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2012 ram 2500 check engine light. #12329968 07/08/17 09:00 PM
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Pinkus Offline OP
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I have a 2012 ram 2500 6.7 Cummins and my check engine light came on, did the key thing to see the codes but there isn't any codes coming up.. is there a way for me to reset the check engine light myself without going to dealer or autozone.. would like to try that and see if it stays off since there isn't any codes before I go to dealer and have em look at it.. Being Texas in July I would really like the remote start to work but it won't with check engine light on.. lol.. appreciate any info.. thanks

Re: 2012 ram 2500 check engine light. [Re: Pinkus] #12330068 07/08/17 10:18 PM
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Samsonsworld Online Content
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Sometimes my Grand Cherokee's goes off by itself, sometimes it goes to the shop. Disconnecting the battery never worked. Welcome to fca.

Re: 2012 ram 2500 check engine light. [Re: Pinkus] #12330723 07/09/17 12:58 PM
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northtexascrappiehunter Offline
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unhook the batteries for 5 minutes, that will reset the computer and the light.

Re: 2012 ram 2500 check engine light. [Re: Pinkus] #12330844 07/09/17 02:55 PM
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Pinkus Offline OP
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Will try that.. really appreciate it..

Re: 2012 ram 2500 check engine light. [Re: Pinkus] #12331743 07/10/17 06:11 AM
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probably emission sensors we replaced tons of them that and previous years.

Re: 2012 ram 2500 check engine light. [Re: Pinkus] #12338667 07/14/17 03:20 AM
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If you still have the check engine light, make sure gas cap has been secured well. It will clear after a few miles of driving and reset. Just an easy thing to do just in case.

Re: 2012 ram 2500 check engine light. [Re: Pinkus] #12385035 08/14/17 02:53 AM
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Pinkus Offline OP
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Update... the light just went off on its on.. I only drive it on weekends so just going to have the stealership check it out when I go get oil and fuel filters change in the next week or 2.. hopefully it will come back on or probaly gonna pay the diagnose fee for em to tell they couldn't find anything lol..
Thanks for responses

Re: 2012 ram 2500 check engine light. [Re: Pinkus] #12390352 08/18/17 01:37 AM
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scruboak Offline
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Almost bet it is going to be o2 sensors.

Re: 2012 ram 2500 check engine light. [Re: Pinkus] #12425659 09/14/17 12:32 AM
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Mileage? My 08 did that when the turbo was crudded up. But that was at 96K miles.


"Any man who thinks he can be happy and prosperous by letting the government take care of him had better take a look at the American Indian".

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Re: 2012 ram 2500 check engine light. [Re: Pinkus] #12426093 09/14/17 12:34 PM
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Use a code reader to see if there are any codes. Some code don't come on when you do the key thing, at least on my truck.

Luckily I have not had a code come up in years on my old 2000.


Re: 2012 ram 2500 check engine light. [Re: Pinkus] #12426140 09/14/17 01:21 PM
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redchevy Offline
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What is this key thing?

I thought you needed a reader of some kind with the OBDII? If the light goes away it is a more trivial problem or the condition isn't persisting that caused the light. If it is something worse it will save the code and it wont go away until cleared. Disconnecting the battery should clear it but you may have to wait a few minutes for it to clear, not just disconnect and hook back up.

Re: 2012 ram 2500 check engine light. [Re: Pinkus] #12431400 09/18/17 04:54 PM
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The "key thing" he's referring to is cycling the key on/off 3 times quick. On the last "on" cycle, a code will show up on the odometer (example: p0341). After that, you can look the code up on the web and get an idea of what you're dealing with. This works on most Chrysler/Dodge vehicles, but not all. Normally a hard code will be stored.

Re: 2012 ram 2500 check engine light. [Re: Pinkus] #12431559 09/18/17 06:23 PM
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Thank you, was not aware you could do that without a obdII reader.

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