With the car running in park you may show zero volts on solenoid a may or may not, not really sure, on fords that use this trans there is 0 volts. How does a mechanic diagnose the P0758 code? I'll try to find references later, but it would make more sense just to have a dealer check your tcm software for updates using their obd tool. Every stoplight same thing, whenever it shift from 2nd to 1st or 1st to 2nd same thing. Can you uses other types or is it not a good idea? What is really puzzling to me is that there are no shifting or slipping issues. Oil is oil and same thing applies to motor oil.
Drive to your local auto parts store AutoZone, Advance Auto Parts, O'Reilly Auto, etc. The list of automotive Makes at the right edge of the screen. This step is important in preventing any serious damage to transmission internals. Whether you need P0758 diagnostic tree information, P0758 diagnosis tips, P0758 technical information, P0758 diagnostics, P0758 troubleshooting help, or just answers to your code P0758 question, the is the place to go! But if it is a chain, it should last a long time and I am not as concerned. It could have been the wiring. I could of sent pics of the exact flow chart diag for that code.
He'll do a diagnosis beforehand, but I'll be surprised if it is anything short of a rebuild. This may be the time to bring to a reputable transmission repair facility to diagnose and repair issue with transmission. Hazen mobil 1 atf will work. Align the alignment holes between the switch and the shift lever. P0758 is strictly electrical related. Back probe the wire put your negative meter to a good known ground. Who knows which one it is unless you test all of them? What might have to be done next is to put a volt meter on the command wire and see what the voltage is doing.
Now when it is stuck in one position you can imagine it would engage the transmission wrong, which means wrong gear or burn up something i. I would replace this solenoid and it will most likely clear the code for the P0753 or since you are going to be in there you can just replace both. Refer to manual for specific desired values. Also for those wanting to change the filter and fluid, the job is quite simple, 20 bolts off and everything comes down. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle.
A new tcm will come with the latest software at the time of production, but later versions may be available depending how long it sat on a shelf. What are the symptoms of the P0758 code? If you choose to back probe at the trans becareful because there is a green and red wire and yours is light green with the red tracer. I got it at 97k, previous 1 owner had all dealer service intervals done. I doubt it and I would have likely payed dealer labour prices to muck around. Perform necessary repairs and test drive. New exactly what I was talking about. Until the next morning when it happens again.
Refer to specific manufacturer for procedures. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. It shifts perfectly from 1 to 2 to 3 but will not go into 4th gear at 40 mph. Resetting the computer did not solve it this time. To ensure that you are safe and that your vehicle is able to run reliably, you should get this problem taken care of immediately. Watch Out For These People!! If you do replace the fluid in the transmission and you will have the oil pan off, it would be a good idea to check the shift solenoid circuit if accessible.
If it helps to id the wire it is right next to an orange wire terminal 2a. Most fluid manufacturers list the makes and models their products are compatible with right on the bottle and certainly on their website. At the tcm its terminal 1A right at the end the wire color is Light green and red. The fluid was slightly black and a small amount of creamy gunk was on the magnet but no metal chips. ? Yes, click your name on any post and there is the option to see all of your posts. Taking the 5 in today for a tranny rebuild. I don't recall it in the forum rules either.
In the V-engine design, Ford follows a similar design with the number one cylinder at the front left of the engine. What the P0758 code means Shift solenoid B allows the transmission to shift between second and third gear. I read this thread probably over a dozen times in the past few weeks trying to diagnose this with my mechanic. Refer to service manual for connector locations. The new fluid I drained out didn't even have 10 miles on it, but it came out nearly as dark as the stuff before. Katner, I see you have an 08.
Go to the dealership as they might be able to know what is wrong right off the bat as mentioned above, and potentially save myself several attempts? Hopefully my pain will help someone else avoid the same, or if nothing else get them back on the road sooner. I used it in my old mazda 3 and had over 100k with no issues in the trans. It could have been the actual Selenoid B. Chessman, I joined this forum specifically to thank you. The family has since been using the unlock lever beneath the shifter to retain use of the car. I am a tech at a dealer.