View Poll Results: Flashing OD light
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Flashing OD light
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New User
Joined: May 2016
Posts: 2
Likes: 0
Flashing OD light
My 95 Ford 250 diesel intermittently drops out of cruise. It is happening now more often now than a couple of years ago. When this happens it is as if the torque converter is not working. If I change speed it slams from one gear to the next. Sometimes when this happens the OD light flashes on and off. This usually lasts for 5 or 10 minutes then it corrects itself and drives normal. Could this be the speed sensor in the differential, the barometer sensor under the dash, the solenoid pack in the transmission, or something else? Whatever it is how do I check to identify the problem and correct it?
Thanks,
Mac
Thanks,
Mac
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,717
Likes: 2,643
From: SE Florida
Yes it could.
Yes it could.
Yes it could.
Yes it could.
Take it to someone that can read the codes that are stored. The places that read codes free CANNOT read these codes. You need either a good independent shop or a Ford dealer. And it isn't going to be free.
Yes it could.
Yes it could.
Yes it could.
Take it to someone that can read the codes that are stored. The places that read codes free CANNOT read these codes. You need either a good independent shop or a Ford dealer. And it isn't going to be free.
Fleet Owner
Joined: Jul 2006
Posts: 20,359
Likes: 819
From: Mi'kma'ki
that would tick me right off not being able to get my own codes.
i would swap in a psd ecm for a manual trans,this way it's engine would be taken care of,then swap in an older idi e40d controller and make quick work of that nonsense.
id still be stuck without the ability to pull codes for my own engine i guess,but id get my trans codes.
i would swap in a psd ecm for a manual trans,this way it's engine would be taken care of,then swap in an older idi e40d controller and make quick work of that nonsense.
id still be stuck without the ability to pull codes for my own engine i guess,but id get my trans codes.
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
A $10 bluetooth elm327 usb or bluetooth OBD2 adapter, your laptop and the free ForScan software will be able to pull your codes. Look under your dash, the OBD2 port will be there.
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Cargo Master
Joined: Mar 2007
Posts: 2,935
Likes: 34
From: Arcadia, Fla
You said the speed control cuts out and then the transmission hard shifts ,most likely the psom is failing. I've had the same issue on my E350.
Even though the speedometer appears to be working fine on the needle and odometer,but is not sending out the correct speed information to the ECU causing speed control and tranny to act up.
Even though the speedometer appears to be working fine on the needle and odometer,but is not sending out the correct speed information to the ECU causing speed control and tranny to act up.
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Lead Driver
Joined: Feb 2013
Posts: 5,006
Likes: 72
From: Roseville, MN
I don't know about diesels, but it doesn't seem like they'd have switched that much before the gassers.
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
Would a '95 F-250 diesel be OBD2? I'm thinking half ton gassers didn't go to OBD2 until '96, and I know that the F-250HD and F-350 gassers didn't go to OBD2 until '99 (except in California when they switched with the half tons in '96).
I don't know about diesels, but it doesn't seem like they'd have switched that much before the gassers.
I don't know about diesels, but it doesn't seem like they'd have switched that much before the gassers.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
It looks like a OBD2 port, but it is not.
I do not think it has a name like OBD1 or 2.
You need a New Generation Star (NGS) scan tool to read the codes.
I have not heard of anything else reading the codes.
I do not think it has a name like OBD1 or 2.
You need a New Generation Star (NGS) scan tool to read the codes.
I have not heard of anything else reading the codes.
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
It is an OBD2 port, and it will work with the above combination I posted. Some early trucks, like the 1994.5 and some '95s did not have the port enabled from the factory, but a dealer update flash update will enable it.
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