Ok...the other day, it's like minus 5 outside....start the Wrangler, no issues....let her warm up a bit and then put it in gear....the 'check guages' light comes on...I notice that the battery gauge is pegged to the right....I get to where I'm going and turn it off, turn it back on, battery gauge is back to normal now....but the 'check engine' light is on....I am assuming that is most likely due to the the battery gauge pegging out on me....correct?