Faulty Throttle Position Switch on Kia Optima

Check Engine Light illumination—combined with a lack of power or a stumble on acceleration—may be caused by the throttle position switch (TPS). Kia released an improved part which should correct this concern.

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Average mileage: 91,821 (10,000–271,000)
Exhaust & Emissions affected: 2.7L V6
13 model years affected: 2001, 2002, 2003, 2004, more2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2014
93 people reported this problem
40 people shared problem details
2003 Kia Optima119,000
check engine light on...started out as a small stumble while accelerating...now the care stumbles and misfires all the time ...replaced plugs and wires, o2 sensors, gas cap, repair shop cleaned the mfa, check engine light will go out for a few days then another stumble and it will come back on ...be on for a few days with the car running fine then goes off again...now its been on for about 3 days and the car just continues to run rougher and rougher...no one seems to have any idea what to do to fix it
2007 Kia Optima79,000
Check engine light came on & car would not go over 15 mph. Shut off & restarted & it was ok. Light came on again. Took to dealership & they replaced the TPS sensor for around $400. 11 months later the same thing happens. Take back to dealership & only under warranty for 12 months or 12,000 miles so i was s.o.l. In the process of getting the sensor to replace then this car is going up for sale....has had several recalls & lots of little but expensive things break or go wrong with it since we purchased it. First & last Kia I will ever own!
2006 Kia Optima121,000
firstly my check engine light came …few week later, my car started loosing power, would get down from 65 mph slowly decreasing to apprx 20 mph… on freeway, i have to pull over to the side of the shoulder of the road.. turn the car off for a couple of min… they start back up.. car gears up fast almost jets off …then same thing couple exits passed. same thing on the streets.
engine had a hesitation when gas peddle was pushed acted like i had water in the gas, check enging lite came on had it checked /was throttle position switch put on new one now after about 20,000miles it is doing same thing ,had it checked and once again it is the throttle position switch.
Car will not accelerate past 1900rpm. Goes about 20mph and 5 mph uphill. it does this intermittently. Not fixed yet
Stumbles while idling in gear. Smooths out when I put it in park.
2006 Kia Optima94,000
Faulty Throttle Position Switch Cost $750.00 to fix at KIA.
stubble in aceleration kia opyima 2005
2010 Kia Optima59,860
It's not happening every time, but when it does the Kia is accelerating with a delay or it seems like it stutters before accelerating. Today for the first time we had the Check Engine Light show up for more than just a few seconds. It was on the whole time we drove it this morning and we scheduled an appointment with the dealership, of course by the time we were going to drive there the light didn't come back on!!! This is the 4th issue with our Kia in less than 14 monthes!!! This will also be our last KIA ever!
2001 Kia Optima271,000
Car jumps at stop signs after taking foot off of brake. Then when accelerating, it acts as though I am flooring it and jolts forwards. Or dies.
2007 Kia Optima64,000
Check engine light came on. My car has slow acceleration and has even shut off when operating. This seems to be a common problem with Kia and they should have to address this and fix this at a reduced cost because it will happen to most of these vehicles.
2005 Kia Optima70,849
car does not down shift to second gear, i was told it was the output sensor. the price for this part is $110.00 can not afford it at this time.
It seems to be a common failure as I am learning.
2002 Kia Optima102,000
Its got a rough idle and at 2500 rpms acceleration stumbles down and up
2003 Kia Optima150,000
The car will not go faster then 20mph.
2009 Kia Optima40,000
At low rpm the engine is shacking.Also when is triyng to shift in superior gear is stalling. Drove in manual mode and shift speeds after rpm raises at 3000 and it will atenuate.
2012 Kia Optima31,830
I was driving and my check engine light came on and I wasn't able to accelerate. I had it towed and they said they fixed it but it happened 13 hours after picking it up. So I had it towed again and they told me nothing was wrong with it. I picked it up and the next day the same thing happened on my way to pick up my son from school.
2007 Kia Optima53,000
Losing power esc light coming on and off
2012 Kia Optima85,000
Engine elk not go above 2500 rpm, I can shift at that speed with manual transmission, so top speed is 70 mph but getting there is slow. Engine light is on, no diagnosis or repairs yet.
2005 Kia Optima11,000
My kia looses rpm when i drive it then engine light turns on
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