replaced the throttle position sensor now it idles at 1500-2000 rpms

2005 HYUNDAI SONATA
137,000 MILES
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TRACYSCHULTZ
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I just replaced my throttle position sensor and now when my car is in park it is idling at 1500-2000 rpms and it is also downshifting hard when I let off the gas or come to a stop. What could be causing this?
Dec 20, 2012 at 3:11 AM
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ASEMASTER6371
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why did you replace the tps???

Roy
Dec 20, 2012 at 3:18 AM
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TRACYSCHULTZ
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my car was idling high and hesitating when i was pushing the gas and then my check engine light came on and that is what the code was.
Dec 20, 2012 at 3:24 AM
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ASEMASTER6371
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codes never identify bad parts, just failed systems. it needs to be monitored to see if it is wiring, grounds or the sensor or pcm. throwing parts at it is expensive and usually wrong

was the trans ok before you replaced the old tps??

Roy
Dec 20, 2012 at 3:30 AM
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TRACYSCHULTZ
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Yes the transmission was fine, just the hesitating while pushing the gas.
Dec 20, 2012 at 3:31 AM
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ASEMASTER6371
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first thing i would do is put the old sensor back on and we start from there.

Please check out this guide.

https://www.2carpros.com/articles/engine-idles-too-high


Please go over this guide and report back.
Dec 20, 2012 at 3:34 AM