E4od and od light flashing
Thread Starter
|
Junior User
Joined: Sep 2016
Posts: 56
Likes: 0
E4od and od light flashing
Was driving my new to me 7.3 psd this morning and it hesitated on a downshift on highway, and OD light started flashing. Any ideas what this is before i spend the money to have codes pulled. 320k miles.paid 900$ for her. Got a heck of a deal.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,703
Likes: 2,623
From: SE Florida
There are about 50 different things that can cause the OD OFF light to flash. There are two ways to find out what's wrong.
First, you can get the codes read and that will tell you what the PCM saw that it didn't like. The second way is to change everything that could cause this and hope you find it. That would include several sensors, the whole transmission, the trans wiring harness, the computer, the rear axle, etc.
First, you can get the codes read and that will tell you what the PCM saw that it didn't like. The second way is to change everything that could cause this and hope you find it. That would include several sensors, the whole transmission, the trans wiring harness, the computer, the rear axle, etc.
Senior User
Joined: May 2014
Posts: 139
Likes: 0
From: N.E Oregon
Were I you I would invest in a code reader (about 35$) rather than pay to have your codes read. I recently learned how to pull my own codes using the CEL and there is just some personal satisfaction in knowing that you did it yourself. Either way, getting the codes is the place to start. Good luck with your new truck!
Thread Starter
|
Junior User
Joined: Sep 2016
Posts: 56
Likes: 0
Just throws the OD flash, no check engine. From my understanding places like autozone or badic scanners couldnt read that? Im thinking torque converter. If im getting into it to get on the highway or when its locked it seems to cause it. Happened when mashing it on the highway. Just drove 45 minutes from work to home easing into it and no OD light came on.
Laughing Gas
Joined: Oct 2014
Posts: 1,227
Likes: 4
From: Washington
E4OD is controlled by the ECM, so any codes would be stored here. The check engine light only tells you about engine faults. The OD off light tells you there are transmission faults. Either way you have to check for codes to figure out what is wrong.
Go out and buy one of these, or one of the many like it.
Innova code scanner #3145
Go out and buy one of these, or one of the many like it.
Innova code scanner #3145
Thread Starter
|
Junior User
Joined: Sep 2016
Posts: 56
Likes: 0
Trending Topics
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,703
Likes: 2,623
From: SE Florida
There is a good chance it is the torque converter.
Is the front face of the torque converter blued? It will get that way if the torque converter clutch is slipping, and that's the most common cause of a P1728 code.
Is the front face of the torque converter blued? It will get that way if the torque converter clutch is slipping, and that's the most common cause of a P1728 code.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Junior User
Joined: Sep 2016
Posts: 56
Likes: 0
Im going to pull my inspection cover later, but thats my guess too, cracked piston internal leak, because it just throws the code getting on it when locked. So it does make sense.
Temporarily Deactivated
Joined: Aug 2003
Posts: 1,859
Likes: 2
Always check your MLPS first with an E4OD.
Another quick test: Lockup should release if you tap the brake pedal. Try it pulling up a grade. Might have more than one brake switch.
Has the fluid ever been changed?
The flashing light is a code. There are flowcharts in manuals to troubleshoot the codes. Test after test in a specific order.
Another quick test: Lockup should release if you tap the brake pedal. Try it pulling up a grade. Might have more than one brake switch.
Has the fluid ever been changed?
The flashing light is a code. There are flowcharts in manuals to troubleshoot the codes. Test after test in a specific order.
Thread Starter
|
Junior User
Joined: Sep 2016
Posts: 56
Likes: 0
out of a 1997 f250, havent added it to my account yet, bought another truck
Thread Starter
|
Junior User
Joined: Sep 2016
Posts: 56
Likes: 0
Always check your MLPS first with an E4OD.
Another quick test: Lockup should release if you tap the brake pedal. Try it pulling up a grade. Might have more than one brake switch.
Has the fluid ever been changed?
The flashing light is a code. There are flowcharts in manuals to troubleshoot the codes. Test after test in a specific order.
Another quick test: Lockup should release if you tap the brake pedal. Try it pulling up a grade. Might have more than one brake switch.
Has the fluid ever been changed?
The flashing light is a code. There are flowcharts in manuals to troubleshoot the codes. Test after test in a specific order.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,703
Likes: 2,623
From: SE Florida
That doesn't prove it's the torque converter. The code can only set when the trans is in fourth gear and the torque converter locked. No matter how much slip there is in third gear that code won't set.
Thread Starter
|
Junior User
Joined: Sep 2016
Posts: 56
Likes: 0
your right its not definite, i did already order a converter, but with it only throwing one code. Its hard to diagnose, and since you have to remove the TC anyway to pressure test it, so might as well sort of thing.