I JUST REPLACED MY THROTTLE POSITION SENSOR AND ...

  • Tiny
  • tracyschultz
  • 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 15-200 rpms and it is also downshifting hard when I let off the gas or come to a stop. What could be causing this?

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Thursday, December 20th, 2012 AT 3:11 AM

5 Replies

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

Why did you replace the tps?

Roy

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Thursday, December 20th, 2012 AT 3:18 AM
  • Tiny
  • 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
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

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
  • Tiny
  • 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
  • Tiny
  • ASEMaster6371
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  • 25,556 posts

First thing I would do is put the old sensor back on and we start from there.

Need to check fuel pressure first.

Timing belt, when did you last change it?

Cat converter back pressure would be next

always start at basics. Do the checks, find the failure and replace the failed part.

Roy

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Thursday, December 20th, 2012 AT 3:34 AM

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