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: 95,207 (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
44 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
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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!
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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.
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Car will not accelerate past 1900rpm. Goes about 20mph and 5 mph uphill. it does this intermittently. Not fixed yet
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2006 Kia Optima94,000
Faulty Throttle Position Switch Cost $750.00 to fix at KIA.
Stumbles while idling in gear. Smooths out when I put it in park.
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!
stubble in aceleration kia opyima 2005
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.
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.
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 Optima115,000
While driving on the freeway the vehicle lost power going up hill. Got home and checked the code. The o2 bank two sensor was what was coming up. Tested the sensor and it was fine. The catalytic converter was the problem. Replaced the catalytic converter. Now that is fine. But the vehicle will drive ok on a flat suface but the transmission still won't shift going up hill. Checked the TPS and it is fine. All this while there are no codes sowing up.
2004 Kia Optima155,000
Changed head gasket,water pump,timing belt, crank sensor thermostat, radiator, ran great for 10,000 miles then started stumbling and jerking then dies. It don't do it when first start in the am, warm up and starts with that engine miss and worse and worse, engine codes po300,301,302,303,304, changed plugs and wires, no arcing from coils or wires, cant believe kia puts this crap out on the market, knowing before its going to happen. Scandalous car maker
When the weather is 50 or below the cars engine light will come on. The car will then feel as if it is pulling back not letting it reach a speed of 45. It gradually will increase slightly and pull back frequently as it is driven.
2006 Kia Optima130,000
It started with the usual problems with a TPS. After I replaced it, all the problems went away except one. The erratic transmission shifting. I just upshift by hand and once I get to 3rd or 4th gear everything is fine. The check engine light also won't stay off. I have the code cleared at Advance auto parts or Auto Zone and it comes back within minutes of driving. It doesn't blink. The trouble code is always the same: Throttle position sensor.
2011 Kia Optima77,342
car ride rough. when setting at light sometime it act like ti wants to shut off. dealer told me to try techron treatment worked for few day, really hate this car only had 6 mos
2006 Kia Optima137,208
Idles high in drove and reverse. Check engine light came on.
2012 Kia Optima87,000
not fixed yet.....just took into the shop.....2nd time taking in for this problem....
2012 Kia Optima13,000
Jerking feeling and engine light is on (not blinking)
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