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Discussion Starter · #1 ·
I had good quality remote start system installed last fall in my 2005 Sorento, to help warm the vehicle up on cold winter days. However, the remote starter does start the engine fine, but only about minus 20C. This kind of defeats the purpose of the remote starter.

As soon as the temperature reaches -20C the engine will not fire/start. The engine cranks over continously but will not fire. If I go out and stick the key in the ignition and start it the engine fires with no problem.

The installer has reinstall the security key and adjusted the codes haf a dozen times, but I still have the problem and the installer does not know what is causing the problem. Well do know the root problem is the -20C, but what is that cold temp affecting with the remote starter and the ignition?

Has anybody got any thoughts or advice?
 

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2003 Kia Sorento
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606 Posts
Since this is an aftermarket remote start, the problem is probably that the installer didn't use the tach-sense feature. With tach-sense, the starter cranks until the tach signal is sensed and the vehicle is running.

The installer probably used either voltage-sense or the timer. Voltage sense works in the same way that the tach-sense works, only using voltage instead. I've found that it's pretty unreliable. Using the timer, the starter cranks a set amount of time. Unfortunately, the time that it's set to crank in the summer is not going to work in the winter, and vice-vera. In the winter the starter needs to crank longer and in the summer it needs to crank less.

I've installed a few remote starts that wouldn't learn the tach signal, for whatever reason. The signal is there and the connection is good, it just wouldn't learn it. Then the only option is to use voltage-sense or the timer function.

If your installer switches to the timer function, you shouldn't have any problems. In the summer, the starter will crank too long but nothing will be damaged because of the starter clutch.

It may take him a time or two to get it right because once the engine is warm/has been turned over you start from square one. That's also the reason after you try to remote start it, and it doesn't work, that you can go out with the key and it will start right up. If you tried remote starting for a second time with the remote it should fire right up.
 

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Discussion Starter · #3 ·
:beer: Thank you for the reply and the information. What you stated makes sense. I will take that info to the installer of the remote.
 

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2015 Optima SXL Turbo
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Hi.
I would just like to add my scenario to this. My son has a 2015 Kia Optima SXL.
He also had an aftermarket starter added and had similar issues.
His began with the remote start not working when it would be -7 c (20 F). After a few weeks, it wouldn't remote start when it was 0 C (32 F).
This year, when it got cold last week, it now will no longer remote start 8 c (47 F).

It is a COMPUSTAR brand remote starter. the installer has looked at it at least 4 time through the past 3 years, doing voltage checks and trying to determine if it is a software issue or voltage loss issue. Nothing has been found. They say they are the go-to for the local KIA dealership to install aftermarket remote starters and have never had this issue with any of their hundreds of installations.

I am going to take it there again, to see if there are any new software uploads for the remote, and provided them your commentary, to see if they can fix it.
As you said, the remote start is useless in cold weather.....precisely when you need it.

Let me know if there is anything else I need to know before I go to them next week.
I will keep you updated on my results.
 

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2020 Sorento SX, 3.3L AWD
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Since it's changing it's behavior based on temperature, I think you're getting gaslighted by the company! I can't imagine how this can be anything but the unit since it's behavior is changing based on temperature!
 
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