Speedometer and automatic transmission problem

Tiny
PAT BENNETT
  • MEMBER
  • 2007 KIA SORENTO
  • 2.5L
  • 4 CYL
  • TURBO
  • 4WD
  • AUTOMATIC
  • 170,000 MILES
Intermittent fault on speedometer when engine hot speedometer would drop from 80km to approx 30 to 40 km then return to normal after a few minutes. Also, the cruise control makes the engine rev up and down when the odometer goes wrong. Changed speed sensor, still have fault. Auto gear box also has intermittent fault when hot some times will not change to the correct gear, one lower then normal will only go into top if I manual use the sport shift. On return to normal drive will stay in top but when need to change down in drive position will not always go into the correct gear unless I put it sport mode again.
Wednesday, October 2nd, 2019 AT 11:48 AM

4 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,222 POSTS
When you say transmission speed sensor did you do both input and output? Can you please shoot a quick video with your phone so we can see what's going on, that would be great. You can upload it here with your response. We should run the codes because when the TCM goes out it cases this issue.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Check out the diagrams (below). Please run this test and get back to us.

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Friday, October 4th, 2019 AT 1:30 PM
Tiny
AUDREY
  • MEMBER
  • 1 POST
  • 2005 KIA SORENTO
  • 40,000 MILES
Went to start my car and speedometer dose not move
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Friday, October 18th, 2019 AT 1:49 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Does Odometer work? Trans shifting good? Check engine light on?
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Friday, October 18th, 2019 AT 1:49 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test the vehicle speed sensor
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Friday, October 18th, 2019 AT 1:49 PM (Merged)

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