Car Problem Reports

Kia Amanti Accelerator Position Switch May Fail and Cause Sluggish Acceleration

Kia Amanti Problem
46 Reports
Me Too

Model Years Affected: 2004, 2005, 2006, 2007, 2009

Engine Affected: 3.5L V6

Average Mileage: 90,398 mi (11,200 mi - 288,000 mi)


The accelerator position switch may fail intermittently resulting in sluggish acceleration or lack of power.

  • Visitor, , 3.5L V6

    It has never been fixed. Car wont accelerate when the weather is hot over 85 degrees . It has done this for last 3 years. Have had in and out of dealer and they can't get it to do the problem!!! this is an ongoing problem for the last 3 years every summer only on hot days. Last week drove about 22 miles nothing happened drove home after shopping for 1 hour left to come home and took over 1 1/2 hours to go 22 miles car wont accelerate. Stop let sit 15 to 20 minutes then can go again for few miles then it does it over and over again.
    Drove today 75 miles one way no problem. Let car cool 30 minutes headed home and went about 30 minutes car would not accelerate again died. Let car set for 30 minutes drove again in stop and go traffic and it went about 2o miles happened again and again at least 6 more times before making it home. Quite tired of this worth less car.

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  • Visitor, , 3.5L V6, 61,000 mi

    car would not accelerate it would just get stuck at about 2000 RPMS

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  • Visitor, , 3.5L V6, 120,000 mi

    Same as others. During cold temps, car will idle, accelerate, and generally be dangerous. Sometimes, get stuck at 2000 rpm. Then, pressing the brake will kill engine. Happens during cold weather predictably. Sucks.

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  • Visitor, , 3.5L V6, 117,000 mi

    Throttle Position sensor has low voltage on check engine code. Occurs after engine heats up and about every 3 day. Headed ti the parts store thanks to repair pal.

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  • Visitor, , 3.5L V6, 112,043 mi

    I have an '05 Amanti which I've sent to the dealer, I've replace the Accelerator pedal position sensor, the throttle position sensor but the problem still persists. I did notice recently that the issue becomes worse in warmer weather. Through some research I've noticed that the issue is probably due to faulty wiring in the wiring harness, but the harness is huge...and the dealer wants over a grand for the harness alone.

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  • Visitor, , 3.5L V6, 61,000 mi

    "Check engine" light on. Diagnostics pointed to the acceleration position switch. Replaced at a garage. Kia dealer's estimate was 4X my mechanic's price.

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  • cmurphy252, , 3.5L V6, 199,160 mi

    I had the same issue happen yesterday that others reported. Pulled out of the driveway and car wouldnt accelerate any faster than 10-15mph/felt like it was going to cut off. I had the car towed to a shop and they stated that it was "short in throttle wiring" and therefore repaired the wiring and "cleaned gunk" from the throttle. My check engine light and airbag light had also been on MONTHS prior to the car dying yesterday.

    It seems to be working fine now that they've replaced the wiring, but I'm a little nervous after reading the other comments from owners having the same issues! Hope they've fixed whats truly wrong with it.

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  • truman, , 3.5L V6, 80,000 mi

    sluggish, sometimes cuts off. no rpm movement

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  • Visitor, , 3.5L V6, 30,000 mi

    At about 40MPH, it wants to chug, until you give it more fuel. Annoying as hell...KIA dealer said it had something to do with over-filling the gas tank, and a charcoal filter? That diagnosis, and supposed fix, ran $900. Off their lot, doing the same thing...mind you, we had not filled the tank since driving away.
    Dealer wanted more $$ to try to fix; no way, as we had seen the posts about this; they claimed ignorance about an on-going problem. Asked for any consideration regarding our $900 outlay-no way!!
    Have lived with the problem for 23K miles now; forget KIA service!! And, tho we love the car for everything else, probly won't buy another KIA.

    By the way, both front window motors went out within two weeks of each other recently. I'll fix those myself, thank you

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  • Visitor, , 3.5L V6, 100,000 mi

    Isn't accelerate ,not power

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