Check engine light on

[aerobert]

Hi! I have a transmission error code that lights the check engine on my Ford 6,8L (F53 2000) since last year same date. I spent 6000$ and the Ford dealer still does not find he problem. At first, the «*overdrive*» light comes on flashing on my transmission lever, mostly when I back up, almost idling. The engine might stop and is easy to restart, but now, the «*check engine*» light comes on and remains. So far, we replaced the transmission sensors, and the power control module, and checked the transmission oil/filter. They work with try/error system. The engine and the transmission are working fine. After replacing the PCM, the only problem I noticed is the «*overdrive*» light that flashes when backing the RV but after I stopped the engine, it restarts well with no flashing this time. I am afraid the problem has not been solved yet. May it be because of the back up camera lighting up when backing? Why is this «*overdrive*» light flashing?? Thanks!

Robert
Holiday Rambler Admiral 32PBD 2000 F53
Quebec Canada

[HarryStone]

What code is associated with the check engine light?

[Mark Kovalsky]

You need to take it somewhere where they are at least partially competent. The idiots you have working on it have NO IDEA of how to determine what's wrong. They are just taking your money.

[aerobert]

Originally Posted by HarryStone

What code is associated with the check engine light?

Precisely, I don’t know. They simply told me that it is a transmission code.

[aerobert]

I asked them to phone a Ford engineer in Detroit, but, I don’t think they did that yet. It is frustrating.

[Flyer15015]

Go to harbor freight and get a code reader.
Plug it in and search the net for the fix of that / those codes................
Youtube is your friend...........

Mike in Colorado

[John Wayne]

Don't know if it will fix the problem, but that year had a problem with the ground for the trans. May research the recall they had for that.The recall I 'm thinking of was for shifting problems between 1st and 2nd. The writeup can be found under 1999 southwind.com. Just checked 1999 southwind.com again and he has a writeup for shift lever light flashing, turned out to be wires in the column.

[donr103]

I took vehicle to f××× shop they had for 5 days.. it had a water leak in trunk.. they called me.. and said they had 5 guys on it with combined 120yrs of working for f×××.. and they can't see where leak was.. I picked it up.. no charge.. sence they could not fix it.. I had wife lock me in truck.. she hosed water.. found 5mins and caulked it..
Get you own code reader.. with a book.. you will need it anyway.. more expensive the better.. it will save you a lot.. I recommend about 200.00 best place to start..
It really could be.. at the manufacturer they tapped into od. Light for back up camera.. I would find the fuse for the backup camera and pull it.. see what happens or just disconnect backup camera in dash..
Many manufacturer having problems with rubbing inside steering column.. that would be next.. but if you take to shop $$$$ a lot of time to hunt down..
Good luck and keep us posted

[POPPASMURF]

Your problem is sounding a little like what I went through, what I finally found with a code reader was speed sensor. Initially I thought I had it made when I changed the one on the rear differential. What I found out is, late 90's Ford used 2 speed sensors on the transmission one at the front turbine and same part number at output shaft, some where in 2000 they changed to one speed sensor on trans, some time later in early 2000's they changed again and used the speed sensor on the rear diff for both ABS and speed sensor. When I took mine to local Ford dealer, chassis VIN didn't help much compared to crawling under the unit. The ones on the trans are easy to get to and are on top quadrant of trans. Parts are available from Rockauto, they have good listing for F53 parts, I forget the part number but they are a longer piece that fits into the tranny. Sometimes just cleaning the connectors does the trick. Be sure to smother connection with dialectric grease to keep the water/salt and grime off the connectors. Even a cheap code reader will do the trick, the better ones usually give more info.

[spyderRV]

PCM ground mod?


https://www.irv2.com/forums/f23/spee...ml#post2837203


https://www.1999southwind.com/f53-tr...-and-2nd-gear/

[bigb56]

The flashing OD light is telling you there is a stored transmission code. Even if it stops flashing, the code will be stored. The check engine light is likely another code related to the engine. You cannot read Ford proprietary codes with a generic scanner, it will only show you the generic codes that all vehicles share but Ford has many proprietary codes that you can only read with a Ford capable scanner. You can download Forscan Lite on your smartphone and order an ELM 327 Bluetooth adapter and read all the Ford codes and get freeze frame info to see what was going on when the code was set. Forscan can also do many Ford diagnostic tests and monitor/record live data. The basic version is free and only a few dollars to upgrade.
You need to run away from those parts changers asap.

[GypsyR]

Good advice from bigb56. You need to at least find out what the codes are. There's a ton of knowledge out on the internet but everybody needs at least a couple of clues.
I find it odd no one has told you what the code is yet. Beyond a "P0700" which is just a drivetrain code signifying that there is a transmission problem specific code also set. If your OD light is flashing then you will have a P0700. Any generic scanner will see that one. It's the one further down that says something specific that counts.

[aerobert]

Originally Posted by HarryStone

What code is associated with the check engine light?

The error codes were P0503, P0720 and P0722. Now, with the OD that flashes, I will find what code is right now on next Monday. The «*service engine soon*» light is not on yet.
All the sensors (3) were replaced at the beginning of the repairs, the connector inside the transmission oil cover too and the PCM.

[GypsyR]

Ok so a VSS code and two output speed sensor codes then. If those parts have been replaced I'd be looking at the wiring for reference voltage. It tends to be shared amongst various sensors and if one fouls it can disrupt the chain or sometimes just the sensor "downstream" from it. Case in point. If you have 5R110W there is an ATSG bulletin where codes like yours have been caused by a faulty radiator fan clutch speed sensor. If you have that drivetrain (I'm not up to speed on exactly what all chassis every model RV used) then you can simply unplug the fan clutch connector and see if your codes go away. You can unplug that sensor for a short test drive. That this is known issue to ATSG doesn't mean Ford knows about it or any of your mechanics have bothered to look into it.