2004 Optima Cruise Control and Speedometer issue - Kia Forum

 
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post #1 of 6 (permalink) Old 10-07-2014, 03:19 PM Thread Starter
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2004 Optima Cruise Control and Speedometer issue

I have two issues that may or may not be related.

While driving on the freeway my cruise control will disengage and no longer work. The green light on the button remains lit. A bit of alternating between shutting the cruise off and back on along with tapping the "set" button will sometimes make it engage again but this isn't very often. When cruise is working, it works anywhere from my whole 35 minute drive to class or not at all with no predictable variation. There appears to be no general "cool down time" window for when it stops working and will start to work again either.

I can usually get a sense of when it is about to happen though. I will feel the car attempt to accelerate and the rpms will go up and down right before it shuts off. (On a side note, at 70 mph I'm between 2500-2700 rpms, is this normal to be that high?)

The speedometer issues appears to happen independently, as I am driving it will occasionally drop from 60+ down to 0 for a couple seconds before it shoots back up to the correct speed.

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post #2 of 6 (permalink) Old 10-08-2014, 12:32 PM
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If the CC ceases to function there is an issue that your dealer needs to fix I cannot opine on the speedometer except the digital readout seems to be screwed up.Both dealer related repairs good luck
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post #3 of 6 (permalink) Old 10-09-2014, 03:32 PM Thread Starter
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I was hoping to avoid the dealership to get a diagnosis...
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post #4 of 6 (permalink) Old 10-16-2014, 11:02 AM
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Originally Posted by Douglas Crossen View Post
I was hoping to avoid the dealership to get a diagnosis...
why it is for sure a warranty issue .Cars are priced with the warranty factored into MRSP so since you have indirectly paid for the warranty why not use it .Th dealer is not the devil
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post #5 of 6 (permalink) Old 10-17-2014, 05:26 PM Thread Starter
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Quote:
Originally Posted by funnyman7915 View Post
why it is for sure a warranty issue .Cars are priced with the warranty factored into MRSP so since you have indirectly paid for the warranty why not use it .Th dealer is not the devil
They are if you are out of warranty lol. I am over 130k miles, unless it is still covered somehow? That would be nice.
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post #6 of 6 (permalink) Old 10-18-2014, 10:26 AM
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Your speedometer and cruise control problems ARE related. It looks like you may have a problem with the speed sensor. Even an instantaneous drop in the pluses would cause the cruise control to disengage with the speedometer NOT showing that loss because it was too quick to be displayed.
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