Ford Super Duty (1999-2016) :: 2001 - O/D Light Flashing - Got Code P0720?
Jan 6, 2010
I have a 2001 F250 Super Duty with a 5.4L engine, regular cab. The truck has 149000 miles on it. I bought it about a month ago and had the transmission rebuilt, the spark plugs and coils replaced. Apparently the shady dealer I bought the truck from had power washed the engine and there was water in 3 of the spark plug wells on the drivers side. When I got the truck back from the transmission shop and backed it out of the parking lot, the OD off light started flashing and the SEL light came on. The code showed to be a P0720 to which the mechanic at the transmission shop replaced the speed sensor on the top of the tranny.
He said if it comes on again then the speed sensor on the rear differential could be the problem and that he would have to charge me to replace that sensor since it isn't covered under the warranty for the transmission.. I replaced the sensor myself on the rear differential yesterday and thought the problem was fixed. I drove the truck around for 30 minutes with no problems, until I put the truck in reverse, then the OD off light started flashing and the SEL light comes on giving the same P0720 code.
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I have a 2000 F350 7.3 4x4. It began giving intermittent tow/haul flashing light, when going up or down hill but would clear and drive next time truck was cycled off/on. No ABS lights and code reader generated P0720 for the output speed sensor, now I can get it to generate just driving slowly fwd and rev a few times. All of this has been in the last few days.
Truck will stall if I take it up a slight incline with the fault. I replaced the sensor on the top front of the 4r100 transmission and also replaced the sensor on the rear differential after giving up on looking for an output sensor on the transmission. I know the 2WD transmissions have an output sensor but is there one on the 4WD version? I have read several past threads discussing the P0720. I am hoping to confirm what sensor I need to be looking at and where it is located in this application.
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Just got the transmission rebuilt in my truck and other then shifting hard sometimes it has been doing great, Hooked it up to the goose neck this evening and everything was fine then went to back it up and pull it forward and after a short distance the od light was flashing and when i ran a check on it it was p0720? The transmission has less then 1000 miles on it?!?!? 1999 Ford F-250 7.3 Automatic....
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I have a 2002 F250 SD V10 4x4, that just started to randomly misfire [does not matter if the vehicle is in motion or in park]. I scanned the OBDII and found pending code P0720 (Output Speed Sensor). The CEL, O/D light, nor the ABS light illuminate. The speedometer functions normally.
This occurred Saturday after we got 12-18" of snow. I cleaned out the driveway, took a short drive (~ miles) & parked the truck (no symptoms). Later we went to 2 stores and then on the way home, the misfire started. The next day the misfire continues.
I have been searching & come up with the same posts that say the issue is not the OSS. It's usually a bad COP or bad wiring @ the OSS. The symptoms are not the same as when I had a COP go bad (only misfired under load between 1500 & 2500 rpm).
Personal issues: My truck does not fit in my garage, it's dark (and usually below 30 F) before I can get to look at it in the evening. Also, we are supposed to get another foot of snow tomorrow night.
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My '01 7.3 is having some transmission problems, My O/D light is flashing. Trying to go after stopping at a light is a difficult, it drives very sluggish, like its not in overdrive. Scanned it and got three codes P0732, P0720, P0503. I replaced the ABS/VSS on the differential and the problem still exist.
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I recentlyHad to replace the right front wheel bearing and after the install the speedometer and turn signals don't work, the ABS light is on and the overdrive light on the shifter is flashing. I've replaced the VSS on the rear diff, pulled and cleaned Speed sensors on front hub?
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F250 7.3L diesel started to flash OD light, goes into limp mode, code p1747. No other codes. Have had issues for a couple of years where the truck would not shift into gear for awhile; sometimes a couple of minutes till it would engage. Have done lots of diagnostics. Visual check harness. Have 12v on pins 1&12 on harness at transmission plug. Plug had some ATF visible, but cleaned it up and continuity good. (with 4" exhaust hard to get to connector).
Checked all solenoid wires with a DVM back to plug at PCM for continuity and shorts, all good. Pulled transmission pack and checked resistance on all solenoids except temp varistor all within specs. Removed Banks Trans Command and rewired tranny plug and pulled Ottomind chip from PCM. Still goes into limp mode and throws code. Did not see any bad solder joints or burns inside PCM by the way.
Seems like PCM right? But here is a complication to my issues. For over a year I have been having electrical issues like the radio not working and windows not working intermittently after starting up. After running for awhile or on restart would work fine. Sounds like the Instrument Cluster issues or relays.(?)
Will be pulling IC and checking for any bad solder joints. However, did not throw p1747 till just recently and now my radio has really gone wonky. It comes on when key is on automatically and then proceeds to cycle through settings; AM-FM-CD.
So questions are, "Is it possible that a bad Instrument Cluster can cause a p1747 code?" "Bad Ground to Tranny" "Can a bad PCM cause a electrical issue in IC??" "Are these 2 separate issues?"
2002 f250 7.3L, 4R100 automatic trans, ~180,000miles
Banks Stinger package, 4" exhaust, TransCommand, (now removed).
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Tonight i noticed overdrive flashing. No changes in shifting, truck shifted fine. I shut it off when i got home, started back up, light was not blinking, not sure if its like the check engine light and stays on or not. Where light blinks but shifts fine?
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I have a 2007f550 auto trans with a flashing tow/haul light and a code of po791 coming up. Flashing light will clear in k/o position and remain off until placing selector in drive,after two feet or so of travel,an audible clunk and the trans acts like it is in third gear. Reverse is no change and highway will not shift into o.d. The iss "A" is listed as the culprit but ford doesn't list a iss a.
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I have a 2001 F250, 5.4, 4X4. My ignition key stuck in the start position and when I pulled it back to the run position, everything seemed ok. As I started down the road, my speedometer stopped working and my overdrive light was flashing. Also my turn signals had stopped working and my A/C clutch didn't engage. Figured I burnt a fuse. I looked in both the under dash and power distribution box and all seemed well. I checked the fuse for the turn signals/flasher and it was fine. The flashers worked. Thought I might have fried something so I replaced the ignition lock and switch. Also my service engine light came on throwing a code for the vehicle speed sensor.
Looking for solutions on this forum and the internet, I learned that the turn signal switch could have gone bad and the VSS sensor is on the top of the rear dif and an easy fix. Well replaced the sensor but nothing changed. So I went back to the fuse box. Examined every fuse, big and small and I found a 10a with a small space. This was #24 under the dash. From the manual, "#24, 10A, A/C clutch, Blend Door Actuator, Trailer Tow Battery Charge Relay Coil, Four Wheel Anti-Lock Brake System (4WABS), Turn Signal." Replaced it and everything went back to normal. Turn signals work, A/C clutch works, no flashing overdrive light and speedometer works. All from a 10A fuse. If you have any of these symptoms examine all the fuses carefully. There's a 20A fuse for turn/hazard lamps and this other one buried that's only 10A.
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I have a 2003 Ford f250 5.4l brought it to the shop today and they said the pcm isn't communicating with the trans. The truck hesitates and stalls out at a stop. idle is OK a little studder. OD light blinks also. I put new ho2s in, new oss from ford, new plugs and coils (motorcraft).
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this morning my 02 decided to turn the ABS light on, and start bouncing the speedometer. plus, the OD light is flashing when stopped with foot on the brakes, but the trans is shifting fine.
nothing changed on the truck except almost 3 inches of rain fell last night.
will AE tell me if the VSS is going bad?
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I know this has been done to death, but on my '08 F250 XL I can't seem to get the truck to enter into the programming mode to program some fobs to it. I've done the cycling business and the best I get is a flashing light on the dash of the truck with a little lock on it, but nothing else. Can you not program the XL? Is there a major step I am missing?
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1998 F-250 LD 4x4 463,000 km.
My truck begins to flash the OD light after driving about 10 km. So I borrowed a friend's scan tool and got a P0503, and P1500. So having been pointed to the vehicle speed sensor, I connected TORQUE and watched closely vehicle speed. Driving at a steady 80 kph it will jump rapidly up and down, from about 72-92, while the gauge in the instrument cluster reads a calm and steady 80.
Which sensor and wiring do I need to inspect? Rear diff or on the back of transfer case? Oh, and the ABS light is NOT on.
Sent from Nexus 4. IB AutoGroup
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2000 F250 V10 Auto/Rebuilt Tranny... This weekend, I noticed my truck wasn't shifting at lower RPMs like it has been. I'm not hitting much higher RPMs per shift then normal. Very soon after, I get a "Service Engine Soon" light and my "OD OFF" light on my shifter handle started flashing.
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1999 f-250 7.3 diesel. Speedometer doesn't work and neither does the odometer, the ABS light stays on and once you start driving the OD light starts flashing and the truck starts shifting weird. I've changed the rear ABS/VSS sensor on the diff and the OSS on top of the transmission at the tail end. Still no luck.....
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I have the dreaded flashing O/D light on my early 99 F350 7.3 4x4 auto. The only one's that seem to be consistently recommended are Snap-On or AutoEnginuity.
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OK, quick question. I have an '03 250 with the 5.4 and the OD light began flashing tonight. I looked in the forums here and everyone say's new tranny or sensor but over on the diesel forums the are saying that the alternator is a big cause of this (dirty power).
At the beginning of this year I noticed what I assumed to be a misfire when putting the motor under a load. Once up to speed it would smooth out and all was good. I was told that a plug job on these trucks is hellish and expensive since a lot of guys break the plugs off in the block. I put it off and the issue went away when the weather warmed up.
Now it's getting cold again and the misfire is back. Driving home tonight the truck died at a light. I restarted it and as I accelerated I noticed a difference in the shift from first to second and then saw the OD light blinking.
Again, the diesel guys are all talking alternator so my question is this: could the alternator cause both the OD light to flash AND the misfire? If the "dirty power" can cause the tranny to fall in to safe mode, can it also cause the ignition to be problematic?
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We have a 2008 f250 super duty with the 5.4 triton well ever since I replaced the power steering pump its been running raggedly, it idles rough and when i get up to 50, 55, 60 the check engine light comes on i put a diagnostic reader on it and said something along the lines of ECU bank 1 an Bank 2. What that is and I've been a mechanic for almost 3 years.
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Overdrive light started flashing this week on my 2000 F450 7.3 mason dump. It only does it when it shifts into 4th gear once it hits that gear at about 35mph the overdrive light flashes until you restart the truck and it resets. Does the same thing all the time but DOESN'T flash if i'm driving around town on back roads and never get to that gear. Could this be something minor besides the transmission starting to go? It drives and shifts fine even when the light is flashing. I wait to get the error code read?
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Looking for a diagram of where the transmission temp sensor is found ..... I have a 2005 f 250 5.4l FX4.... My tow haul light keeps flashing...
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