Replaced the throttle position sensor now it idles at 1500-2000 RPMs

TRACYSCHULTZ

MEMBER
2005 HYUNDAI SONATA
137,000 MILES

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?

5 Replies

ASEMASTER6371

EXPERT

Why did you replace the tps?

Roy

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Thursday, December 20th, 2012 AT 3:18 AM

TRACYSCHULTZ

MEMBER

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.

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Thursday, December 20th, 2012 AT 3:24 AM

ASEMASTER6371

EXPERT

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

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Thursday, December 20th, 2012 AT 3:30 AM

TRACYSCHULTZ

MEMBER

Yes the transmission was fine, just the hesitating while pushing the gas.

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Thursday, December 20th, 2012 AT 3:31 AM

ASEMASTER6371

EXPERT

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.