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My turbo quit working on my 2013 kia optima sxl I think it might be the boost sensor but the check engine light isnt on and it's not throwing out any codes how can I find out what is wrong with it or if it's even that sensor
 

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2011 Kia Optima
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When you say quits working, just no power but can hear the turbo spool?
First, check the wastegate voltage @ 4.1, and normally a code, but check all fittings as well as the intercooler for any leaks.
It's a start
 

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2012 Kia Optima SX
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If the car feels severely down on power and significantly decreased throttle response, it's most likely the wastegate actuator being out of range. It's not difficult to adjust if you have a multimeter and the adjustment nut isn't seized.

I had the same thing happen to mine and my adjustment nut was rusted on, no amount of penetrating oil was helping and I figure if it's going to break while I'm trying to fix it, I'm going to have the dealer break it and not me. $99+tax at the dealer to have it adjusted.
 
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