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Check engine light...again

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Old 6/27/16, 06:59 PM
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Check engine light...again

My check engine light is on again. It has been on and off for a month now. I thought it was because of the gas cap, but that has been closed tight. I have an appointment at the dealer on Tuesday. Hoping for the best.
Anyone with similar issues? What was the cause of your check engine light?
Old 6/28/16, 01:53 PM
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I had a check engine light two days ago on my 2013 V6 after a hard pull.

I was pissed and confused about it, so I runned a code check with my SCT tuner to find out a General error code 21000. After looking for the code on the net, there wasn't much info about the failure, so I began to stress even more.

Then I had a flash about me asking for a boost for my dead battery the day before. The battery boost had probably messed up my tune, so I tried unplug the negative terminal to reset the CPU, cleared the codes and installed back my tune. Two days have passed and no more check engine light.
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