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

2005 HYUNDAI SONATA
137,000 MILES
Avatar
TRACYSCHULTZ
  • MEMBER
  • 2 POSTS
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 19, 2012 at 7:11 PM
Advertisement
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
why did you replace the tps???

Roy
Dec 19, 2012 at 7:18 PM
Avatar
TRACYSCHULTZ
  • MEMBER
  • 2 POSTS
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 19, 2012 at 7:24 PM
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
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 19, 2012 at 7:30 PM
Avatar
TRACYSCHULTZ
  • MEMBER
  • 2 POSTS
Yes the transmission was fine, just the hesitating while pushing the gas.
Dec 19, 2012 at 7:31 PM
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
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 19, 2012 at 7:34 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.