Ford Super Duty (1999-2016) :: 2003 F250 - Service Engine Light Keeps Popping On And Putting Out Code P0401
Nov 5, 2013
I just bought a 2003 F250 from a used dealer. Unfortunately the service engine light keeps popping on and putting out the code P0401, I have replaced the EGR, cleaned the inside, and cleared the code. However it continues to keep popping up and then it will turn off after a couple of days. I mostly drive in the city and the code generally only pops on when I drive on the highway. I have also noticed a lack or delay of power, when I really hit it hard, I think its because the computer is keeping the egr valve open. What it could be?
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I've researched the heck out of P0401.... I have an 04' F250 w/a 6.0, 61k miles, completely stock. I have been getting a reoccurring P0401 EGR flow CEL. I've checked all the fittings and tubes and see no cracks or breaks. I've checked the exhaust system and no signs of leaking soot anywhere except on the passenger side exhaust manifold, there is some minor deposits of soot near the first two cylinders, but that's it.
Everything else looks good and I can't hear any hissing either. I am not getting any white smoke from the exhaust. I pulled my EGR valve and looked at it, it looked fine. I cleaned it off and put it back in. Then I got a new one just to see if that fixed it. I am missing a little coolant. I'm adding maybe a few cups of coolant every few weeks. Truck is always serviced and only repairs was Ford replaced the EGR valve in 2008. When I pull my EGR valve, it is slightly moist in the housing but not wet and no sludge. Again, the EGR valve had a nice layer of soot, no build up or sludge on it....
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So yesterday I decided to wash my truck and after taking care of that I took it for a short drive and the tranny started acting funny. Check engine light comes on and the code is P0500 . It calls for a VSS but I cant locate it. Also the fact that it did after washing the truck is making me think its a wiring issue... F250 SD 5.4 4x4 ....
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I have 2003 f250 7.3 automatic 181,000 miles completely stock. Never had chip,tuner or anything on it. I am second owner and got it when it had 70,000 miles on it. Ok here we go I live on top of a mountain and soon as i start up the mountain or any steep hill, or pull or tow something my service engine light pops on. First time it came on I took it to diesel shop they hooked it up to scanner and said it was code p1211 said icp sensor was bad so they put new one on. Couple days later light started popping back on so i decided to order a auto ingenuity after doing some research.
Hooked up to truck started up mountain while scanning at wot light pops on code p1211 and think it was live data I remember seeing icp pressure at 1922 and duty cycle at 63% i was trying to drive and read it at same time and my lap top went dead. What does this reading mean 1922 pressure/ at 63% cycle done little research but dont really understand. Year and half ago replaced all orings on all injectors, new rebuilt hpop pump. New ipr valve, glow plugs, past month 2 different icp sensor new,and new ipr valve new pig tails on both and light still popping on.
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1999 F250 Super Duty. My service engine light came on while driving doing around 65 mph. Truck seems to be running normal, no loss of power or acceleration. It's a 5.4L with 104000.
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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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I have a 2011 f250 with the 6.7l diesel. Overall it's been fabulous. Descent mileage, and never ending power. The service engine soon light came on the other day. I have checked the fuel and dropped some additive in the tank. Have also checked the air filter which is good. There is a hesitation when giving it throttle. Then it shoots like a rocket.
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I have a 1999 Ford V-10 Triton 6.8L engine with 100,000 miles in my Motorhome. Service engine soon light has been a problem for the past couple months. I have replaced the O2 sensor on the passenger side and the EGR valve. After that I drove for about 300+ miles continuously and stopped to get gas. Light stayed off and I thought I had it fixed but after starting up again the light came back on. The codes are P0171 and 0174.
I had the air filter replaced before changing the sensor and valve and mechanic left the Mass air flow sensor out of the socket I had a sluggish engine and at the time I thought I sucked water into the filter, I was driving in a pouring rain, this sensor plugs into the air intake above the filter correct?) I plugged that back in. What is my next move because I reset the service engine soon light and it runs great then the light comes back on after I shutdown and restart.
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2001 f350 7.3 diesel and I come up with the codes for upper and lower dual generator fault. I have only one alternator not the dual.. I checked the gauge and it is running at 14 consistently. But the service engine soon light keeps coming on...I clear them and they come right back... Alternator is only 2 years old and not a rmf..
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My 99 F250 with a V10 had an abs light come on and then it would go off. Now the ABS light stays on and it drove fine for a little while but the other night the Service Engine light came on along with the ABS light. Tranny was shifting harsh, winding out and I scanned the codes and got P0500. Is it the sensor on top of the rear differential or is it the ABS light causing the problem?
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I've got a 2004 f250 4x4 crew cab that is driving me nuts. It runs great, but sporadically it will just quit running. Tach drops to zero. Engine is still turning, because it usually restarts by itself as long as I am moving over about 45. If not I can pull over, put it in park and restart it. Sometimes it sets codes, never the same ones and usually not something even related to the problem (transfer case solenoid for example). Most times it doesn't set any codes. I have changed the plugs and coil packs on all cylinders. Right now it is showing the P1000 code so I am suspicious of the pcm or the wiring to it. I think the tach is the only thing dropping out on the instruments and all the instruments are powered through the pcm.
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Just bought this pickup is a 2011 F250 xl with the 6.2l. The service 4x4 flashes on the dash. The 4x4 shift motor fuse blows instantly when replaced even with the vehicle off. I then went and disconnected the plug ins from the shift motor and tried a new fuse and it blew again. Not sure where to go from here.
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After replacing most of the underside of my Super Duty, Complete front end, backing plates, brakes, rotors and shocks, I have a misfire code on cylinder #4. I replaced the plugs, cleaned the MAS and filter and rotated the coil to cylinder #1. Still have a misfire on #4 and noticed the coolant slightly low and some condensation on the oil cap. Could this be the intake gasket? My mechanic is away for 2 weeks and I think the price at the dealer will kill me. I have 63K on the truck, don't tow and plow mostly family members. It's getting a little rusty but is still in good shape.
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I have a 2002 f250 super duty 4 dr w/ full lenth bed. has v10. had oil cooler problem, motor oil in coolant. fixed that, then rad started leeking, replaced that. now blowing freeze plugs on block. replaced i on drivers side rear, now popped one on pass side. whats going on? i know oil pressure is more than water, did the oil cooler leak losen the freeze plugs? What size freeze plugs they are? no parts house around here knows.
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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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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 recently bought a 2003 F350 super duty dually automatic transmission 6.0 deisel 4x4. The 4x4 is not working. with the hubs in auto when i flip the switch to 4x4 high nothing happens.The same with 4x4 low putting the truck in neutral. I can only find 2 fuses using the owners manual that says anything about 4x4 and both of them check out good. Also the owners manual says when i turn on the key I should see a 4x4 light and a low range light momentarily. Neither of these lights are showing up. I don't hear any clicking or any noise of any kind when trying the 4x4.It acts like an electrical issue but not sure where to start.
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Having problem with the speakers popping like they are busted when listening to HD radio only. I took it by the dealer and they told me to not listen to HD radio.... Really, I paid all this money and now I can only use some of the features....It has the Sony system with Mytouch. Any update or TSB on this. It's really annoying when your trying to jam out and your speakers sounds busted!!!
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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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I have a 2003 f250 super duty with a v10
i was towing a trailer up and down lots of hills and the battery light on the dash came on. there was no effect on the performance right away. as i kept driving into town i was starting to worry if i would make it.
as i pulled into the carls jr parking lot, the ABS light came on, all the gauges shut off and the truck died just as i pulled into a parking spot.
i figured it was the alternator, had it tested at AutoZone (failed twice) so i swapped it out for a lifetime warranty AutoZone one (very small town, nothing other than an AutoZone)
the truck started after being jumped but the battery light was still on. i figured that the bad alternator killed the battery. the battery was 4 years old and they usually only last 3 years in the AZ heat so i bought a new duralast gold.
the battery light was STILL on after that. the Autozone guy ran his test--- engine off- battery tested fine starting---he said something was wrong with the starter (but it cranked awesomely!) running--alternator tested fine
i just can figure out why when i drive down the road i dash light will turn on and off at random times. the truck seems to run fine. I've even been under the hood shaking the wire while i had someone watching the dash and i cant seem to make the light go on or off
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Just replaced the alternator in my 1993 Ford F250. How do I reset my check engine light? It keeps coming on after I drive for roughly 5 to 10 minutes.
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