Shift Solenoid Plug

[Kluce]

I'm sure this has been asked, but couldn't find it with a search. My truck has just went into limp mode, and is throwing code PO750 shift solenoid. My truck has the gray plug on the solenoid , but all I'm finding say white plug. Is there a difference, and if so what?

 

[ayesijuan]

I just got the same thing on my 2007, it says shift solenoid A. Which one is A? Can I just replace solenoid or do I have to replace whole pack?