OD off light flashing- transmission

Posted by: rick1970

OD off light flashing- transmission - 05/20/10 09:55 AM

the od off light is flashing on and off...the car is hunting for gears...any idea what to check??..thank you.....
Posted by: Colt45

Re: OD off light flashing- transmission - 05/20/10 10:06 AM

Youll need to pull the codes from the computer. Flashing OD light indicates a transmission fault.
Posted by: rick1970

Re: OD off light flashing- transmission - 05/20/10 10:23 AM

ok..thank you....so how many things could it be??!! something easy and cheap i hope.....
Posted by: Colt45

Re: OD off light flashing- transmission - 05/20/10 10:28 AM

Dozens. The codes will be more specific and it could be anything from loose or corroded wiring to a transmission rebuild. Try to avoid driving the car until this is repaired.
Posted by: rick1970

Re: OD off light flashing- transmission - 05/20/10 10:34 AM

well..i have to drive it to the shop..thats it..i have a bike..so hope no rain...!
Posted by: gDMJoe

Re: OD off light flashing- transmission - 05/20/10 11:17 AM


Eenie meenie chilli beanie, the spirits are about to speak! ...

And the year, make, and model of your vehicle is ?

HINT/TIP: Put your vehicle information in your sig' -OR- provide it your posting(s).
Posted by: rick1970

Re: OD off light flashing- transmission - 05/20/10 11:41 AM

2001 ford crown victoria p71 97K miles
Posted by: 99_03PantherS

Re: OD off light flashing- transmission - 05/20/10 12:22 PM

Dont drive it anymore.
If the OD light is flashing, it can be a sensor of some kind. Need to have the code checked.
Posted by: rick1970

Re: OD off light flashing- transmission - 05/20/10 04:00 PM

i concur about not driving it..but have to get it to the shop..pushing it sucks...towing well...sucks...driving it three miles is that bad??...thanks guys...
Posted by: spenck07

Re: OD off light flashing- transmission - 05/25/10 12:17 AM

I just started getting that same thing bought the car two weeks ago, and now over 50 or 60 it does it, no shift problems or overdrive issues just blinking light.
Posted by: SteamRoller

Re: OD off light flashing- transmission - 09/19/11 12:45 AM

So how do I pull the transmission codes? I have an OBDII scanner but I don't think it will help with the codes.
Posted by: MyP71Vic

Re: OD off light flashing- transmission - 09/19/11 11:43 AM

Mine does this also I got some codes from it about a month ago then everything cleeared up and worked great now it is back. The codes I got were P1783 trans temp, P1705 tran rng out of test rng, P1502 vss inter apcm functioning, P1501 vss out of self test rn, and P0500 veh spd vss er. These seem kind of random or are they related through one sensor? It is totally fine when driving very easy. Fluid is like new still cause it keeps leaking a little so I just keep adding it as it goes to keep it fresh!
Posted by: JSanders

Re: OD off light flashing- transmission - 09/19/11 09:58 PM

High temp is one cause for a flashing light. If you can measure the temp with a touchless temp probe while it is flashing, you might see if the temp is too high, if the sensor is bad or not. You can shoot the bottom of the tranny pan and get a pretty accurate trans fluid temp that way.
Could be that your trans cooler is plugged up, or the thermostat on the trans cooler is frozen shut. Normal is around 180 degrees, mine takes a good 10 miles to get up that high unless it's super hot out.
Posted by: SLOBRA

Re: OD off light flashing- transmission - 09/19/11 10:17 PM

Originally Posted By: JSanders
Normal is around 180 degrees


That seems pretty high man unless you have a stall converter maybe. I had a scanguage on mine last year with the 3800 stall and 4.10 gears and never saw more than 165. I basically borrowed the device and beat the crap out of it for 15 minutes.
Posted by: olopezm

Re: OD off light flashing- transmission - 09/20/11 12:14 AM

Originally Posted By: SteamRoller
So how do I pull the transmission codes? I have an OBDII scanner but I don't think it will help with the codes.


You can give it a try, some transmission codes can be read with a cheap scanner, if nothing comes up then you'll need to have it diagnosed with the proper scanner. I've seen that kind of behavior on transmissions when the Transmission Range Sensor aka Neutral Safety Switch or Manual Lever Position Sensor goes bad; a bad VSS can cause that too.

Originally Posted By: MyP71Vic
Mine does this also I got some codes from it about a month ago then everything cleeared up and worked great now it is back. The codes I got were P1783 trans temp, P1705 tran rng out of test rng, P1502 vss inter apcm functioning, P1501 vss out of self test rn, and P0500 veh spd vss er. These seem kind of random or are they related through one sensor? It is totally fine when driving very easy. Fluid is like new still cause it keeps leaking a little so I just keep adding it as it goes to keep it fresh!


It looks like your fluid leak has caused intermittent contact with the sensors. I would inspect the connectors and sensors and give them a good clean with electric contact cleaner.

Oscar.
Posted by: JSanders

Re: OD off light flashing- transmission - 09/20/11 12:35 AM

The 01 has a 180 thermostat built right into the trans cooler.
Posted by: MyP71Vic

Re: OD off light flashing- transmission - 09/20/11 10:09 AM

Actually I had only replaced some of the coils before cause the store didn't get them all in right away and now that I replaced the last few it is driving normally again. Could it just be a coincedence or could a very slight misfire which came out to 1 in each of the 2 cylinders in a 15 min run cause tranny issues like searching for gears occasionally and the light flashing briefly then going away? It would only do this 1-2 times per drive. Also the fluid leak is up in front from the hose on the tranny cooler so I am not sure if it could make it that far back.
Posted by: olopezm

Re: OD off light flashing- transmission - 09/20/11 08:40 PM

Might be; transmissions rely on a good engine performance to work properly. Just keep an eye on it to make sure you don't end up damaging your transmission.

If you have a cheap OBD II scanner you might want to give it a try to see if there are any pending codes, some transmission codes can be read this way.

You're right the leak wouldn't cause that based on it's location.

Oscar.
Posted by: SLOBRA

Re: OD off light flashing- transmission - 09/20/11 09:32 PM

Originally Posted By: JSanders
The 01 has a 180 thermostat built right into the trans cooler.


Interesting. Did that change in the newer 4R70Ws? Mine is out of a 99 Vic so maybe it's different.
Posted by: Bangster

Re: OD off light flashing- transmission - 09/20/11 09:59 PM

98+ external cooler has a thermal bypass, I don't know the temp on it.
Posted by: FLP71

Re: OD off light flashing- transmission - 10/30/11 06:24 PM

I had the same problem after getting my P71 stuck in mud, turned out to be a blown PCM fuse causing the OD off light to flash. Just reminding you guys sometimes it's the basic things.
Posted by: gcassidy

Re: OD off light flashing- transmission - 04/15/13 05:44 PM

FWIW, I had this happen after going through a car wash.

It started flashing after it came out of the wash. Code was P0713-Trans Fluid Temp high input. Since it was only about 50 degrees that day, and I had only driven a couple miles to the car wash, I'm expecting some water shorted something.

The light stopped flashing after a day of drying out, and I have cleared the code. So far so good. And damn it looks good when clean.
Posted by: stalag

Re: OD off light flashing- transmission - 04/15/13 06:06 PM

Get that looked at. The corrosion in the wire can cause other problems if this is neglected.
Posted by: gcassidy

Re: OD off light flashing- transmission - 04/15/13 07:12 PM

Good idea. Is it more likely a wiring harness or internal?
Posted by: maroonlagoon

Re: OD off light flashing- transmission - 12/04/14 09:11 PM

Hey Gang,
I'm having this OD flashing light accompanied with a temperature gauge that will not go up. Still blows warm air, and fluid in the res.. Its an 03 LX if anyone might be able to give me a pointer...
Thanks