Overdrive won’t turn off

[VelociRanger]

I’ve got a 2008 Ford Explorer, v6 AWD. Previously a fire marshal’s truck, so it has the “cop” style center console. The other day I was thinking about using the trailer and wanted to make sure I could get overdrive off. I pushed the button, and no indicator light came on to let me know it was off. Took it for a drive and it shifted into overdrive. I tried engine running in park, engine running in drive, engine running in neutral, engine off in park/drive/neutral…nothing. Is there a secret?? I’ve only owned trucks with manual transmissions so this is new territory to me. Is there a wire to look for under the shifter, is this a common problem? Thanks in advance for any help.

 

[Bazz270]

Well

First of all,check for any error codes detected.use forscan

Then,check the harness and the button (from the gear stick to the transmission module) for short cuts to voltage/ground and for the resistance.

You will need to find any suitable electric drawings for this vehicle.

 

[VelociRanger]

Fixed the issue. After googling and some “down the rabbit hole” searches, I did find another member on another forum that was having the same issue. They said they replaced a circuit board, but didn’t say which it is. Googled “transmission circuit board” and found a YouTube video and how occasionally the gear shifter is stuck in park, the fix was also….a circuit board!! The video gave me a part number, ordered on eBay. Super easy install. Picture of the Ford part number.