2012 Sorento SX Intermittently Won't Start - Page 2 - Kia Forum

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post #11 of 22 (permalink) Old 04-22-2017, 11:08 AM
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Had the excact same problem on my Sorento. Turned out to be the starter. Had the dealer check everything prior, and of course all was ok. They didn't really believe me until I had the car towed in.

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post #12 of 22 (permalink) Old 04-22-2017, 11:55 AM Thread Starter
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Had the excact same problem on my Sorento. Turned out to be the starter. Had the dealer check everything prior, and of course all was ok. They didn't really believe me until I had the car towed in.
Good to know! I'll mention that when the car goes to the dealership on Monday, 4/24.

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post #13 of 22 (permalink) Old 04-22-2017, 01:59 PM
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If it's the starter, it's either a bad battery connection to the starter or a faulty starter. When the starter is engaged, a drive gear moves in the starter to make contact with the flywheel. The starter then turns the flywheel that starts the engine turning and allows combustion to start.

I thought of another case that happened to me once or twice on a previous car I had. I think someone called it "vapour lock". This happened when the engine was hot and I pulled over to check a map and I shut off the the car. When I went to start it back up, the heat of the engine caused the gas in the fuel lines to vapourize and prevent the car from starting. After waiting a few minutes it cooled down and started back up. However, in this case, the engine did turn over so this is not your situation. More info here https://en.wikipedia.org/wiki/Vapor_lock

Another thing to try when it happens is to keep the start button pushed for an extended period of time. I believe it's 10 seconds or so. The manual says that this can be done when the brake light fuse is blown and you can't replace it immediately. I think it can be used for some other situations also like the neutral safety switch not working properly. In my Canadian manual it's described starting on page 5-7. Info about neurtral safety switch here https://www.yourmechanic.com/article...-safety-switch

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post #14 of 22 (permalink) Old 04-23-2017, 11:26 PM Thread Starter
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Another thing to try when it happens is to keep the start button pushed for an extended period of time. I believe it's 10 seconds or so.
If the dealership still can't fix it (the car is there now), this is definitely worth a try, and is something that I didn't know about. Thanks!

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post #15 of 22 (permalink) Old 04-25-2017, 02:24 PM Thread Starter
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UPDATE: When I took the Sorento in, the service manager told me that Kia had just released a TSB on this very problem, and the cause is a bad inhibitor switch in the transmission (prevents the engine from starting if the transmission is not in either Park or Neutral). He tells me that, in my case at least, Kia will replace the part for free. The dealership doesn't have the part in stock, so I have to take the car back when they do. I'll post when it's done.

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post #16 of 22 (permalink) Old 04-25-2017, 07:29 PM
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Good info, thanks for posting that.
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post #17 of 22 (permalink) Old 05-02-2017, 01:22 PM Thread Starter
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Well, it's fixed -- I hope -- but not for free. Apparently, the Sorento, a 2012 with 86k miles on it, is too old to qualify for a free fix under the TSB. The inhibitor switch cost $67.55 (list $80.42) and the labor was $238.35 (R K KIA in Vineland, NJ). Plus NJ sales tax, of course.

Time will tell if the inhibitor switch was the cause of the intermittent starting issue, but obviously, it is common enough for Kia to finally issue a TSB.

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post #18 of 22 (permalink) Old 05-02-2017, 04:56 PM
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That's odd. Did you or can you get a copy of the TSB? If it's for a 2012, then that means probably all of the ones affected don't qualify for the TSB under warranty.

Also, I wonder if this qualifies as a safety issue. If that's the case, you would think that KIA would cover the costs in any case.

It might be worth calling KIA about it.

If you have a copy or can get a copy of the TSB, please post it.
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post #19 of 22 (permalink) Old 05-02-2017, 10:54 PM Thread Starter
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I did not get a copy of the TSB -- in fact, I don't think I have ever gotten one for any vehicle. I have only gotten recall notices.

It's probably not considered a safety issue, since the car never stalled while being driven, it would just refuse to start from time to time.

I looked on TrueDelta for TSBs and recalls, and there are none posted for this issue yet. I did find this statement, though:
"Even if there are symptoms, a manufacturer doesn't have to pick up the cost of a TSB repair if the car is out of warranty, though sometimes they do."
So, this being a six-year-old car (even though it's a 2012 model year, we actually bought it in July, 2011) with 86k miles on it, and "just" a TSB, I'd be surprised if they covered it.

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post #20 of 22 (permalink) Old 05-03-2017, 07:40 AM
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When I was an active dealer tech..TSB's were proprietary to the dealers of such makes, unless "leaked" to the general public now that we have the "wonders of the "net". It is NOT a "recall", but their answer to techs on what and how to fix real world use problems that have been found to develop. Unless found while vehicle is still in warranty, these are usually not covered under warranty.
Glad to hear that the trouble you had seems to be fixed!
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