Overdrive light flashing and transmission is not shifting properly

2000 KIA SEPHIA
222,414 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC
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STEVEN HAMILTON2
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  • 1 POST
Check engine light is on, and the speedometer jumps like crazy, when I took it up I get gear 1 ratio incorrect and gear 4 ratio incorrect, car won't shift to 3 or 4 gear, and will only shift to second manually (sometimes). I replaced my speed sensor due to other forums but still no change. help
May 25, 2020 at 11:40 AM
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DANNY L
  • CERTIFIED EXPERT
  • 5,648 POSTS
Hello, I'm Danny.

Yes, it definitely sounds like you have a transmission trouble code stored in your cars computer.If you don't have access to a scanner or code reader most local auto parts stores like AutoZone will check for free. Here is a tutorial showing what is involved:

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

After the scan is performed get back to us with the code numbers and we can then properly diagnose the issues.Hope this helps and thanks for using 2CarPros.
May 25, 2020 at 4:05 PM