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: 93,508 (10,000–271,000)
Exhaust & Emissions affected: 2.7L V6
14 model years affected: 2001, 2002, 2003, 2004, more2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014
99 people reported this problem
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Viewing 1 - 20 of 42 problem details
2003 Kia Optima 119,000 mi,
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
2006 Kia Optima 121,000 mi,
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.
2007 Kia Optima 79,000 mi,
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!
Car will not accelerate past 1900rpm. Goes about 20mph and 5 mph uphill. it does this intermittently. Not fixed yet
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.
Stumbles while idling in gear. Smooths out when I put it in park.
stubble in aceleration kia opyima 2005
2007 Kia Optima 64,000 mi,
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.
2006 Kia Optima 94,000 mi,
Faulty Throttle Position Switch Cost $750.00 to fix at KIA.
2001 Kia Optima 271,000 mi,
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.
2010 Kia Optima 59,860 mi,
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!
2003 Kia Optima 150,000 mi,
The car will not go faster then 20mph.
my 06 Kia Sportage runs very sluggish. it wont pick up speed when you try to accelerate. you can have it on the floor and it wont go over 15mph. I changed the spark plugs and wires, no change. i'm reading that it may be the acceleration position switch, guess that'll be my next thing to change. after that I don't know what to do...
2005 Kia Optima 70,849 mi,
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.
2013 Kia Optima 41,880 mi,
We've had that part replaced before, but it keeps happening. It occurs 3 or 4 times every 6 months. I began writing it down to show the Service department, but I've been told that if Kia can't "replicate" the issue, they refuse to take action.
2007 Kia Optima 79,000 mi,
Hesitation starting. Check engine light comes on frequently.
2003 Kia Optima 154,356 mi,
Engine light came out. Power loses and takes time to get going.and a little clicking noise. And when in park exhaust is puttering
2006 Kia Optima 144,000 mi,
Car has been to shops. They have said alternator because battery was dying but mostly at night. I know this points to alternator but the light and engine dimming when low RPM's concerns me because it will get me a ticket surely, it's that bad of a dimming. TPS light on. Dog acceleration but not bad. Lights flicker is main problem. Them dim unless rpm's are higher than 3k.
2007 Kia Optima 53,000 mi,
Losing power esc light coming on and off