Transmission fault code P0732?

CHRISJSTRN

MEMBER
2004 FORD F-150
4.6L
V6
2WD
AUTOMATIC
190,500 MILES

My truck overheated one day and about a week later the truck wouldn't shift out of 2nd gear and the O/D light started blinking with "Trans Fault" on the display. I hooked up a scanner and it gave the code "P0732" if I drive it really slow without letting it go past 2nd none of the lights come on, but as soon as I try to give it some gas and it gets to second gear the engine revs and the lights come back on. This truck just had a brand new transmission put in it about a year ago and all the fluid levels are correct, and the fluid doesn't look, or smell burnt.

I'm leaning towards it being something electrical and maybe the truck overheating somehow messed something up, or maybe it's irrelevant. I'm just not sure how exactly to go about locating the short or Fault. From visual inspection I haven't been able to locate anything but I know that doesn't mean the wires are good. I also replaced the output shaft speed sensor with no luck. Should I look into replacing the input sensor?

Any advice or help would be greatly appreciated! This is my work truck and I've been unable to work ever since it started acting up, kind of a double edge sword, don't have the money to pay a shop and can't work to get the money without my truck.

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi,

If the transmission is only a year old, I would like to think it isn't an internal issue. Instead, like you I suspect it is electrical.

The code you have is identified in my manual as either a shift solenoid A or B has failed or there is internal damage. See pic 1.

The remaining pics are the diagnostics specific to the code. You will need a scan tool that can communicate with the modules and actuate them when requested.

Take a look through the directions and let me know if you have questions.

Take care and Happy Easter,

Joe

See pics below.

Images (Click to make bigger)

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Saturday, April 8th, 2023 AT 8:19 PM

CHRISJSTRN

MEMBER
2 POSTS

Thanks for the pics! Definitely very helpful! Would you happen to know the cheapest option for a scanner that could test the different components? Would Forscan have that capability? I used Forscan lite with a Wi-Fi ELM327 Connector just to get the basic codes, but I have the OBD connector that goes straight into the laptop.

Something I also forgot to mention, when I pulled up the plastic trim that runs along the outside edge of the floorboards (directly under where the doors would be if they were closed) the wiring channel along both driver and passenger sides were both full of water. I didn't see any breaks or anything in any of the wiring but I'm wondering if water was able to get in there (I'm assuming through the firewall) if it didn't somehow get behind the fuse panel and damage the wiring going to the solenoids. Would there be more things not working if that were the case?

Thanks again for all your help!

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Sunday, April 9th, 2023 AT 1:31 AM

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi,

It is possible that something has been affected by the water. Before we continue, dry everything and allow it to sit for a day to see if that allows things to go back to normal.

Anything is possible. Also, it may or may not affect other components simply based on which wire or wires were wet.

As far as the scanner is concerned, I'm not familiar with the one you are referring to. Is it a bidirectional scan tool? That is what is needed. Basically, not only can it retrieve codes and information, but also it is able to input requests.

Let me know.

Joe

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Monday, April 10th, 2023 AT 7:42 PM