Ford Super Duty (1999-2016) :: Engine Light Flashing / Solid When Get To The Cruising Speed
Oct 14, 2015
I have a 2008 F250 SD 5.4L with 335,000KM's(200,000+miles).
The engine light came on a few weeks ago and I cannot seem to get rid of it. I have also noticed when I'm accelerating hard at higher speeds/RPM's the engine light flashes?? After when I get to the cruising speed and let off the gas pedal the engine light stops flashing and stays solid. Also when accelerating hard there seems to be a hesitation, almost like the engine is choking itself. Once it gets passed the hesitation point during hard accelerating it seems fine? I have ran about 6 bottles of Seafood through the engine and gas tank. It definitely worked out but still has the hesitation, flashing engine light syndrome...I have changed the following with still no luck...
-Spark Plugs
-Coil on Plug
-Fuel Injectors
-Cam Phase sensors
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Solid yellow engine light. Sounds and drives fine. Is it always emissions or can it be something bad? I was going to leave sunday for a 2 month trip pulling the RV. Now stuck waiting for wednesday for dealership.
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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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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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Im having an issue with my 2000 f250 7.3 diesel. 4x4. The od light is flashing and the tranny is kind of jerky when it shifts. Also my truck won't go into 4 low. (I have shift on the fly) and every time I put it in park my truck revs up to 2000 rpm for a few seconds. I do have a ts 6 pos. Chip with can tunes on it. And I have already replaced the IPR. It does it even in stock setting.
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2002 F-350SD V10 Automatic. Running down the road with no load or with load. First gauges bottom out, next overspeed light starts flashing, engine goes to 3000 RPM on it's own. Stays that way until I shut off then restart. Sometimes it does this several times in one mile.
Second trick, again driving along, all gauges stay up but engine just stops. Got to set dead for 5 minutes before it will start. The shop says on the first problem this happens: Voltage goes way low then goes way high then everything starts failing. We changed battery but no luck. Got to be down line from battery.
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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 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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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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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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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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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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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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I have an 04 F250 4x4 king ranch with a 6.8 V10.
When I first bought this truck it had a problem of stalling out at stops. You could sometimes hold the brake and gas and push your way through it but it would sputter for a second and try to die and then it was fine once you got going. The OD light would flash, check engine light would come on and it would throw a P0720 code for the OSS. I did some researching and I pulled the sensor in the pumpkin before that because I read that could cause the same problem, so I cleaned it and put it back but it didn't solve the issue. Then found that an K&N air filter can often times clog the MAF and cause the issue so I pulled my air filter and sure enough it was a K&N, I swapped it with a normal filter and sprayed some MAF cleaner and its been running like a top for months... until now.
It started again, gradually at first. It would die when I started to back the truck at a very low speed to load my 4 wheeler. I fired it up and it was good again for a couple more weeks, then I went to hook to a horse trailer and I was having to back up a hill to get to it, and it just kept dying, OD light would flash, check engine light came on. I was in a bind so I just tried wiping off the MAF with a rag, that didn't work, my girlfriend was using the truck and said it kept dying whenever she stopped. I got it home and cleaned the MAF with cleaner really well but the problem persisted. I went ahead and changed my oil, spark plugs(gaped at .052-.054), replaced the IAC(which looked like it had been installed once before so I am guessing someone tried it and when it didn't fix the problem they returned it) and changed the fuel filter. I drove it around and it ran fine, drove it to work and it ran fine, my girlfriend took it for about 15 minutes to run an errand for me and it was fine until she got back in the parking lot and liked to never got it parked again it stalled so much.
So I went back to the drawing board and read that it is rarely the OSS that is the problem but that often times the issue is a bad coil pack. I don't have a scanner nor do I know how the heck to use one. I plan on going out of town at the end of the week and the truck has 194k miles on it so rather then take it to a shop and try to find out which COP was bad I just decided to replace all of them(I know, I know, you should never just start replacing parts). I only had time to replace 5 of them, I took the truck out and again it dove fine for an hour, went through traffic OK. It sat for an hour and when I left it started to die again, I could drop it in neutral and it would fire back up and as long as I gave it just a hair of throttle it stayed running fine, take my foot off the fuel and in a minute it would die again. After I drove for a bit it was fine again. Now I know the problem may yet be in the remaining 5 COP that I must change tonight but in case it is not I wanted to get input on this.
I've read the problem can come from a bad ground, so I took every ground point that I could find under the hood and I cleaned the connectors and took the paint off at the connection site just for good measure. The problem persists. I've read that sometimes a diode can go out on the alternator and cause this problem, I did use my amp meter and I'm checking out at 13 volts while running. I'm not the best with meters so I'm not sure how else to check the diode?
I've also read that taking it to a dealership is hit or miss for them diagnosing the problem, sometimes they find the issue, sometimes they just change the OSS. The only mechanic I trust closed his shop and is now service manager of the Dodge dealership. I'm thinking since this seems to be a common problem that maybe ford might have more knowledge of it then dodge but I trust the dodge dealership more because of who is over it. Either way I know it will sit in a dealership for awhile before it ever gets looked at and if they have to chase any electrical problems then that starts racking up $$ fast.
So what am I missing? I've thought about replacing the MAF since cleaning it the first time solved the problem. When it did this the first time I still had my 01 F250(it never gave me problems like this) and so I took the MAF off of it and swapped them and sure enough it fixed my problem so I switched them back after I cleaned the MAF and like I said it's been running fine until recently. I'd rather not throw money at this by replacing parts and hoping for the best. I've also read about tracing the harness that runs from the sensor on the pumpkin to the OSS and on. That harness runs through all kinds of stuff so I'm dreading that but it will also be a next step. I haven't pulled the OSS because its in a very awkward position on my truck.
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I have a 99 f450 and the od light flashes when the truck is in low range. I have to shut the truck off when I put it back in high range to get it to stop. It won't flash again till I use low range again. whats going on?
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So coming home yesterday from our camping trip the tow/haul light started to flash. this was about 40 miles into the trip. So we pulled over, the tranny fluid looked low, so I added a little more. The light stopped flashing, but maybe another 20 miles it started again, we pulled over and it stopped. We got to a rest stop and after about 20 minutes, I called Good Sams Roadside, there tech said to take it out of tow/haul mode and so we left the rest stop and it was good for just about 40 miles.
We hit another rest stop, at this point we were about 80 miles from home. I did not feel any difference in the truck shifting or if it was acting different. The light flashed again, sometimes going off, then coming back on. We hit two more rest stops, letting the truck rest. We left the last rest stop, we were already halfway up a big hill on the Mass Pike and after 5 miles the light came on, but then after a few miles it stop and from that point to my house ( which was just over 50 miles) it never came back on.
The truck is a 2006 F250 gas that just hit 100,000 miles. New motor put in over the winter and a few years back had the cam phasers and some work done on it. Could this be some sensors, etc that is starting to go and needs to be replaced?
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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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1999 F-250 7.3 Ext Cab 4X4... I just got this truck and it started having the 4x4 light flashing or flickering while driving and sitting?
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