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: 87,972 (11,000–183,000)
Exhaust & Emissions affected: 2.7L V6
10 model years affected: 2003, 2004, 2005, 2006, more2007, 2008, 2009, 2010, 2011, 2012
64 people reported this problem
32 people shared problem details
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!
17 people like thisFlag inappropiate
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
13 people like thisFlag inappropiate
Car will not accelerate past 1900rpm. Goes about 20mph and 5 mph uphill. it does this intermittently. Not fixed yet
9 people like thisFlag inappropiate
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.
8 people like thisFlag inappropiate
2006 Kia Optima94,000
Faulty Throttle Position Switch Cost $750.00 to fix at KIA.
6 people like thisFlag inappropiate
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.
5 people like thisFlag inappropiate
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!
4 people like thisFlag inappropiate
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.
4 people like thisFlag inappropiate
Stumbles while idling in gear. Smooths out when I put it in park.
3 people like thisFlag inappropiate
stubble in aceleration kia opyima 2005
3 people like thisFlag inappropiate
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
2007 Kia Optima83,000
Beginning 3-4 years ago, I had trouble 1x/year where the car would not accelerate beyond 20mph. I took it to the repair shop (it had just over 50,000mi, so was no longer under warranty), they cleaned the throttle, said I'd need to take it to the dealer to diagnose exactly what the issue was. For the last couple months, the car has been having the same problem with increasing frequency. I took it to the dealer and they said I need a new throttle body ($440) & gasket ($4) & they could fix the car for $775+tax. A car with well under 100k mi (or under 200k, really!) should NOT be having issues with the throttle. This was my second Kia & is looking to be my last due to a number of small issues & this one big one. Pretty sad because otherwise I'd be a happy owner.
2003 Kia Optima14,000
No power and skipping
2006 Kia Optima96,000
Loss of Power when accelerating......had the plugs changed and still not fixed
2010 Kia Optima119,000
no solution yet just happened
It seems to be a common failure as I am learning.
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.
2004 Kia Optima100,000
No fix. Replaced nearly every year and it is faulty very regularly.
2006 Kia Optima98,000
Same problem. No solution, other than another repair bill.
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