Hello, my son has a 01 f150 4x4 quadcab, 5.4, auto and its giving us fits. Only codes its throwing is, P0755 shift solenoid B malfunction. P0443 evaporative emission system purge control valve circuit. P1451 evaporative emissions system vent control valve circuit malfunction. He felt like after hitting the highway that the truck hadn't shifted from d to od so he shifted to neutral thinking he was in the wrong hole then back to drive. He said it went into second hard then into drive and od but the od light on the shifter was blinking. He drove about 6 miles to home pulled in the drive and went for reverse but had none. He said the engine ran fine. He turned it off and left it sit over night. Now it will start and idle but you cannot give it fuel or it pops and dies. Also when you into neutral it will drive forward, drives forward in d, 2nd, and low. In reverse it seems to want to go forward but also seems like it wants to go backwards to. Can't get it to excelerate so we're not sure which direction it would go in reverse if any. He is thinking the shift solenoid may be the trans trouble but now with the other symptoms we're afraid that may be a waste of time at the moment since the engine isn't running right. Does anyone have any insight to any of this? Thanks in advance.

 

Check fuse #23 in the engine bay for being blown.
If yes, there is a short to ground in the harness some where under the truck..
Good luck.

 

Had him check #23, he said he pulled it out and it was 15amp and not blown but after he put it back in the truck ran fine and has reverse. Only trouble now is when he hits 35mph it acts as though its in neutral with the over drive on but if he turns the over drive off it shifts.
Thank you for the help.

 

If the OD lamp does not light or flash signaling an electrical operation issue,
the trans needs repair service.
Good luck.

 

The trans light is not flashing now so I guess he should start looking into another trans. Thank you very much for your help.

 

You're going to replace the trans for a bad shift solenoid? I wish I was as rich as you are. You have a code for a bad shift solenoid. It would be WAY cheaper and easier to replace the bad solenoid instead of the whole transmission.

 

Is that what it is even though the light isn't flashing? I'm not educated on this modern stuff and definitely not wealthy. It's my sons only mode of transportation and he's trying to transition from military life to civilian life on a part time job so he doesn't have money to throw at it either. I'm sure the solenoid, filter, fluid and gasket will cost more than he can afford at the moment.

 

You said it had a code P0755. This code says that shift solenoid "B" is stuck. The shift solenoids are part of the solenoid body assembly, you can't replace just one solenoid. Either replace the solenoid body, or the entire transmission, or park it. I don't see another choice.

 

You must understand we don't know personal details.
You have got to be kidding not to know a fluid, filter and a solenoid change would cost much less than a replacement transmission.
The mistake many make is guessing about a problem, throwing parts and money at a problem without enough diagnostics to warrant what is done.
Check for transmission codes first before doing anything else.
Transmission codes don't always light a CEL lamp because they are not part of the engine control system.
The PCM is the only smart system that has a separate way to show troubles or you could not see an electrical issue if it occurred involving the transmission.
There is a logic to how it works.
What I was trying to relate to is if there is found no code cause for a transmission malfunction then it's likely a mechanicals issue not electrical.
But until proven, you don't know, and guessing is not the answer or you will not only spend money but waste it as well.
Good luck.

 

See that's what I'm afraid of Bluegrass 7, throwing money into solenoids, fluid, filter, ect... And not fixing the problem. He will have to educate himself and spend wisely because he can't afford to throw money away. Posting questions here where people have experience is very helpful and educational not to mention honest. You really never know if you'll get that at a garage. Mechanically I can fix anything, electrically I'm very much handicapped. Thanks for all the help and info.

 

You didn't have any codes that indicate an electrical problem with the transmission. You have one code that indicates that a shift solenoid is bad. The electrical part of this repair is unplugging a connector, and plugging it back into the new solenoid body.

 

Ive been in that position where I didn't have much money. and I can tell you that when I had no money, I didn't own a pick up either. a car is cheaper to buy. maybe sell the truck and buy something more economical.