check engine light
03-20-2011, 09:59 PM
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check engine light
My wife (yes I know) parked the truck in the garage the other night and for some reason left the key turned on in the ignition which I found the next morning because I heard a hum when I went into the garage which was coming from under the hood. Anyway, the batteries wouldn't turn the engine over so I put it on the charger for a bit.
1st question....what would be running with the key in the on position that would cause the batteries to drain and would it cause any damage?
2nd question.... the check engine light is now on. What would be the reason for this and how do I clear the light off or check a code without a reader?
I guess if I had a 3rd question, it would be why do I let her drive the truck.
1st question....what would be running with the key in the on position that would cause the batteries to drain and would it cause any damage?
2nd question.... the check engine light is now on. What would be the reason for this and how do I clear the light off or check a code without a reader?
I guess if I had a 3rd question, it would be why do I let her drive the truck.
03-20-2011, 10:21 PM
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if you cycle the key on and off 3 times to display the codes, what does the odometer say? im going to guess its the computers, dash module, guages, fan etc that sucked it dry, i have done it to mine and it didnt seem to mind too bad after i charged it,
03-20-2011, 11:52 PM
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Oh, and by the way, if the wifey drives truck from now on please ask that she hand you the keys to that precious work of art that is the Cummins
!!!!!!
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03-20-2011, 11:58 PM
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with key in "run" position, all the modules are "awake" and when they are awake, they are draining the battery. I would imagine you have low voltage codes and some "U" codes. U codes are for communication, when power got below threshold, there started to be communication issues (setting a "U" code). charge up the batteries, go to local parts store and have them pull the codes. you should be fine but keep an eye on the batteries, they are not designed to be pulled down that far and survive very often.
03-21-2011, 12:50 AM
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Thanks for the info and suggestions. I don't know of any parts store around here that will pull or clear codes but I'll look around. As for the batteries, if they need replacing, the cost comes out of the old lady's entertainment budget.
Last edited by big horn06; 03-21-2011 at 12:51 AM. Reason: spelling
03-21-2011, 06:53 PM
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03-23-2011, 11:56 PM
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I threw a charge into the batteries enough to start the engine up and during the course of the days driving, the check engine light went out. Life is good and the wife wins a reprieve.
By the way, why isn't my sig coming up on these posts?
By the way, why isn't my sig coming up on these posts?
03-24-2011, 10:33 AM
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