Overdrive light blinking and will not go past 55 MPH

Tiny
JOSEPHG548
  • MEMBER
  • 2004 FORD CROWN VICTORIA
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
When I bought the car, the owner informed me that the overdrive light flashes and that the shift solenoid needed to be changed. The overdrive wouldn’t engage, the light just would blink. Yesterday I changed the shift solenoid, torque converter clutch solenoid and the transmission control solenoid since I was already in there. When I first turned the car on after changing those the light didn’t blink and I was able to press the button and it engaged and disengaged, then the light started to flash again. The only difference being that now the overdrive does engage at random, and the car won’t go past 55 MPH and you can feel and see with the blinking light when it engages and disengages.
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Sunday, July 10th, 2022 AT 10:38 AM

5 Replies

Tiny
KEN L
  • ADMIN
I have seen the pressure regulating solenoid go bad and cause this issue, but we should run the codes to see what comes up. This guide will help, and I have included the location and how to change out the PRS in the diagrams below.

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 happens.

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Sunday, July 10th, 2022 AT 4:45 PM
Tiny
JOSEPHG548
  • MEMBER
Thank you for the fast response! My code reader is not advanced enough to pull code from a police interceptor, so I’ll have to find free time hopefully tomorrow to go to a shop. I have changed the PRS, for some reason the website had it labeled transmission control solenoid. I have had the codes pulled before I changed those solenoids and it came back with shift solenoid, but I also had P0446, P0443 and P1747.
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Sunday, July 10th, 2022 AT 8:26 PM
Tiny
KEN L
  • ADMIN
Yep, the first two codes for the EVAP system which shouldn't affect the transmission but the Error Code P1747 is defined as Transmission Pressure Control Short Circuit. Please let us know what happens.
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Monday, July 11th, 2022 AT 2:41 PM
Tiny
JOSEPHG548
  • MEMBER
Okay, since I replaced the solenoid, I’ll go and order a new wire harness for the transmission and go from there.
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Monday, July 11th, 2022 AT 5:42 PM
Tiny
KEN L
  • ADMIN
Please let us know what happens.
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Tuesday, July 12th, 2022 AT 10:58 AM

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