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Code P0758

Tiny
BLUEEYESPDC
  • MEMBER
  • 2009 FORD FUSION
  • 2.3L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 92,000 MILES
We have changed what we thought was the shift control solenoid B. We are still experiencing the same problems hard reverse and only shifts one hard time during driving. I am unable to locate a diagram for the location of the solenoids I am at a total loss. It is a fnr5 transmission.
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Saturday, July 8th, 2017 AT 4:11 AM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
All solenoids are in the transmission valve body and should be changed as a unit. They may not be getting power and a professional scanner should be used to test if they are getting power or not by using the scanner to apply them one at a time. Check battery voltage and for clean terminal ends. Low voltage can cause problem as well or poor grounds. See pictures.
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Saturday, July 8th, 2017 AT 5:36 AM
Tiny
STEVE W.
  • MECHANIC
  • 13,577 POSTS
It is also possible that it is not a solenoid issue and you actually have a hard part failure. The system monitors the actions caused by the solenoids by watching what the transmission actually does, so say the solenoid is working and it applies the fluid pressure to the correct port, but the clutch or band is bad, the action that the control module sees is not what it expects for that solenoids action, so it tosses a code saying the solenoid is bad.

However, the best thing to do is as HMAC says, you need the correct scan tool to cycle the various controls and see if they respond correctly.
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Sunday, July 9th, 2017 AT 12:40 PM

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