Transmission upshift problem

2006 CHRYSLER PT CRUISER
85,000 MILES • 2.4L • 4 CYL • 2WD • AUTOMATIC
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LEITZ1942
  • MEMBER
  • 1 POST
The check engine light comes on while stopped and the transmission will not up shift out of first gear. If I pull over and shut engine off for about 5 minutes and the restart, the check engine light comes on, but the transmission does shift properly. I have had PCM replaced 2 times and numerous other things done. It now does it sporadically.
Jul 28, 2019 at 6:00 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,837 POSTS
  • ASE Certified Mechanic
Hello

It sounds like you have a input (turbine) shaft speed sensor that is going out. To confirm lets run the codes to see what comes up. also here is the sensor location so you can check it out:

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

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Jul 30, 2019 at 12:15 PM
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