Transmission not shifting properly and Overdrive off light is flashing?

2007 FORD FOCUS
219,000 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC
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DEVIN320
  • MEMBER
  • 2 POSTS
O/D off light flashing and is shifting harder won’t shift to 4th.
Aug 25, 2022 at 10:44 AM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
We need to run the codes because it sounds like you may have a clogged catalytic converter. you can get a code scanner from Amazon for about $20.00.

Here is a guide/video to show you how:

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

Here is a scanner link:

https://amzn.to/3Qi1SS6

If no codes are present, I would try replacing the turbine shaft speed sensor. here is how the job is done in the images below.
Aug 25, 2022 at 5:47 PM
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