What OBD II scanner for transmission code?
 

I just bought a new to me truck. 99 f150 lariat with 5.4l engine, auto transmission.

I've got an intermittent flashing od light. Previous owner said he drove for 3 years with the light on. I took the truck to 2 auto stores that refused to scan the truck while running. The problem is, when the truck is turned off, the light resets. It may take 5 minutes of driving or 30 to get the light to come back on.

Anyway, I figure I need a scanner. What scanner will fit the bill on the cheap? Thanks!

I have one of the cheap elm327 bluetooth modules connected to my smart phone and use the torque pro app. I may have 15.00 into a scan tool.
My od off light was flashing I hooked up the scanner and it gave me the code for my problem. You can also check real-time data stream on most of your engine vitals.

Ditto what he said^
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Ok, I got my Bluetooth scanner today and paid for torque. My od light is flashing, I scanned for codes, and torque tells me "no codes stored in ecu". Is there any way to scan for the tranny code or am I gonna have to go to Ford to get this scanned? Thanks!

Look up how to add PIDS to torque add the preset Ford PIDS and it should work

Added the Ford PIDs. Still not seeing any codes when I scan. Looking at the menu of PIDs, I see all of them, but there is no data. There is a green ecu next to each item. When I click edit, it lets me test each one, but some say "no response" and others will show numbers that I don't know what they mean. Help? I really don't want to go to the dealership!

I got some of the pids loaded onto the real time data screen. Right now as I was driving, the od started flashing at the exact same time a loud squealing started on the right rear side of my truck. Is that a coincidence?

This is the scanner I bought, based on the reviews and the slightly higher price than some of the others.

It may be something to do with the year. I googled how to get transmission codes and got mine to work.

Can you post what scanner you got? I just noticed in the real time screen at the bottom it says "faulty obd scanner". Gonna return it.