Car Problem Reports

Kia Optima Faulty Throttle Position Switch

Kia Optima Problem
56 Reports
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Model Years Affected: 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010

Exhaust & Emissions Affected: 2.7L V6

Average Mileage: 91,115 mi (14,000 mi - 183,000 mi)


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.

  • Visitor, , 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!

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  • Visitor, , 119,000 mi

    check engine light on...started out as a small stumble while 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 on for a few days with the car running fine then goes off its been on for about 3 days and the car just continues to run rougher and one seems to have any idea what to do to fix it

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  • jd61665, , 87,000 mi

    Car will not accelerate past 1900rpm. Goes about 20mph and 5 mph uphill. it does this intermittently. Not fixed yet

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  • Visitor, , 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.

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  • Visitor, , 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.

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  • g12345, , 95,000 mi

    Stumbles while idling in gear. Smooths out when I put it in park.

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  • Visitor,

    stubble in aceleration kia opyima 2005

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  • Visitor,

    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.

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  • Visitor, , 94,000 mi

    Faulty Throttle Position Switch Cost $750.00 to fix at KIA.

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  • Visitor, , 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!

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