Overdrive light flashing?

Tiny
CDERIDDER
  • MEMBER
  • 1999 FORD EXPLORER
  • 4.0L
  • V6
  • 4WD
  • AUTOMATIC
  • 203,306 MILES
What cause the over drive light to flash?
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Tuesday, July 25th, 2017 AT 6:28 PM

32 Replies

Tiny
HARRY P
  • EXPERT
When a Ford over drive light flashes, it is telling you that there is some sort of issue with the transmission. A local transmission shop should be able to scan it and see what the issue is
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Wednesday, July 26th, 2017 AT 3:15 AM
Tiny
FRED MCGEE
  • MEMBER
  • 1999 FORD EXPLORER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 167,000 MILES
Why does overdrive light flashes on and off
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Monday, December 21st, 2020 AT 1:16 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
If the OD light continues to flash, the computer has identified a problem within the system. What you need to do is have the computer scanned for codes.

Most parts stores will do it for free.

Let me know what you find.

Joe
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Monday, December 21st, 2020 AT 1:16 PM (Merged)
Tiny
JFTOATES
  • MEMBER
  • 1999 FORD EXPLORER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 106,000 MILES
The overdrive(lockout) light on the dash comes on after about five minutes of run time then flashes for as long as the car is driven. Is this a modual going out or a problem with the transmission?
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Monday, December 21st, 2020 AT 1:16 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi:
It could be a module. Have you had the computer scanned for codes?

Joe
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Monday, December 21st, 2020 AT 1:16 PM (Merged)
Tiny
HONDATECH74
  • MEMBER
Is the o/d button loose?
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Monday, December 21st, 2020 AT 1:16 PM (Merged)
Tiny
RON1949
  • MEMBER
  • 1998 FORD EXPLORER
  • 6 CYL
  • 4WD
  • AUTOMATIC
The overdrive light on the dash of my 1998 Ford Explorer is flashing on & off. What could be the problem?
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Monday, December 21st, 2020 AT 1:16 PM (Merged)
Tiny
WRENCHTECH
  • EXPERT
That is an indication that the transmission control system has identified a malfunction and stored a code. You will need a professional scan tool to be able to retrieve the stored TCM codes.
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Monday, December 21st, 2020 AT 1:16 PM (Merged)
Tiny
MTABOR
  • MEMBER
  • 1997 FORD EXPLORER
  • 9.0L
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
I was driving on freeway, and noticed the o/d off light flashing, I didn't notice anything weird/different, until I was coming to a stop. The first stop light I kinda thought it was just me; I was wearing flip flops and maybe my foot slipped or something. Then at the next stop sign, it was almost kind of like a hesitation? Our speedometer was discovered last weekend is 5 mph off. Please help.
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Monday, December 21st, 2020 AT 1:17 PM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
Good afternoon,

With the light on, there is a code stored in the system. In most cases, it is the torque converter that is the issue.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

https://www.2carpros.com/articles/automatic-transmission-problems

The first thing I would do is change the fluid and filter. It may be starving for fluid from the filter being partially clogged.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Roy
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Monday, December 21st, 2020 AT 1:17 PM (Merged)
Tiny
MTABOR
  • MEMBER
I assume you are talking about the transmission fluid?
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Monday, December 21st, 2020 AT 1:17 PM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
That is correct. Sorry, I forgot to mention that.

Roy
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Monday, December 21st, 2020 AT 1:17 PM (Merged)
Tiny
RAMCCULLOUGH311
  • MEMBER
  • 1997 FORD EXPLORER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 219,000 MILES
Why would the over drive off light just start blinking out of no where?
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Monday, December 21st, 2020 AT 1:17 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
The computer has identified a problem. The light's flashing is telling you to have the computer scanned to identify where the problem is coming from.
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Monday, December 21st, 2020 AT 1:17 PM (Merged)
Tiny
DORSEYBLACK
  • MEMBER
  • 1996 FORD EXPLORER
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 17,400 MILES
I have a 1996 Ford Explorer 2-wheel drive 4 cylinder. As I am riding, once I am riding a few miles, the o/d off. Overdrive off light starts to blink on and off. I can feel the truck sort of jerk right before this starts. Once the engine is turned off, I can again ride for a while and then it happens again. This has been occurring for about 2 weeks now.
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Monday, December 21st, 2020 AT 1:17 PM (Merged)
Tiny
MHPAUTOS
  • EXPERT
Hi there,

You will need to get a scan done as this is a fault light, there will be a code set that will indicate where the problem will lie, start here.

Mark (mhpautos)
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Monday, December 21st, 2020 AT 1:17 PM (Merged)
Tiny
ROBERTWILEYJR
  • MEMBER
  • 1995 FORD EXPLORER
Transmission problem
1995 Ford Explorer 6 cyl Two Wheel Drive Automatic 135k miles

my overdrive light keep blinking on my 95 explorer, it wont shut of, I disconnect the negative cable and it stay of for five minute, what do I need to do to repair this problem. Also here are the scan code 646 on 1 & 2 Gear and 647 for third gear, what do these code mean?
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Monday, December 21st, 2020 AT 1:17 PM (Merged)
Tiny
RACEFAN966
  • EXPERT
Well with everything that I can find it could be the overdrive button or the torque converter is also a very common problem. What I need you to do is see if you can the trouble codes from the transmission. What you need is a paper clip and a test light to get codes. Use the pic below to hook up. The top pic is what to use. Hook the test light up how they show the meter hooked up. Now they show a jumper wire from the self test input (single small connecto) to the signal return on the larger test connector that is where you put the paper clip so that they are connected. Now turn key on engine off and the test light will start to blink. It will blink once short pause then blink twice and longer pause then it will go to the next code. This is a code a 12 it means it is going into self test mode. Now with the rest of the blinks just count them in the same way get back to me on what you find.


https://www.2carpros.com/forum/automotive_pictures/249564_Graphic_83.jpg

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Monday, December 21st, 2020 AT 1:17 PM (Merged)
Tiny
ROBERTWILEYJR
  • MEMBER
Here are the scan code 646 on 1 & 2 Gear and 647 for third gear, what do these code mean?
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Monday, December 21st, 2020 AT 1:17 PM (Merged)
Tiny
RACEFAN966
  • EXPERT
These codes are indicating a transmission problem. Now there is a couple of tests for you to perform if you like. One is a drive test that you can do and then pull the codes again to see what is still present.
The other is a pin test. I say clear the codes and then do the drive test and see what codes come back. Here is how the drive test is to be done ok.
First warm the engine up to normal operating temp. Ensure that the transmission is full. Now put the truck into into drive and press the O/D switch to turn off overdrive. Your light should be on. Now get up to 40mph and hold it there for 15 sec (30 seconds if you are 4000 ft elevation or more). Now push the O/D button to go into overdrive and accel to 50 mph and hold for 15 sec (30 if above 4000 ft). Now while maintaining your speed use your other foot and light press on the brake pedal (just enough to make the lights come on) now maintain 50mph for another 5 secs. Now bring the truck to a stop for 20 seconds while keeping it in drive (like you are at a stoplight for 20 seconds). This driving cycle need to be done 5 times then we need to see what codes come back. If the codes come back then you will need to have a digital multi meter so we can do some pin tests at the transmission wire harness ok. Let me know how it goes.
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Monday, December 21st, 2020 AT 1:17 PM (Merged)

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