Ford Super Duty (1999-2016) :: Truck Keeps Throwing Communications Code And Goes Into Limp Mode
Feb 17, 2014
I recently bought a h&s tuner and installed a dpf delete kit. Everything works great when the truck is not plugged in to the tuner although when I do plug it in, the truck keeps throwing a communications code and goes into a limp mode until I delete the code. I believe it was p0073 but i maye be mistaken. Regardless it has to do with communicating through the obd2 port. I sent the tuner in to get checked out and it turns out its something to do with the truck. I've checked all the fuses and tried to check for broken wires. Where to look next?
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Bought a brand new F250 6.7 it has 7000 miles in it now and the check engine light comes on and the truck goes into limp mode. I have taken it in to the dealership twice they said there is no code they can find and they just reset the check engine light and it does ok for a bit then starts the cycle all over again. It also is only getting about 6.5 mpg....
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My F250 with V10 has developed an overheating problem. While driving, the temp gauge suddenly shoots to max, and the truck goes into limp mode. Turning off the truck and ignition, waiting a few minutes, and all seems to be well again - sometimes for only a minute, sometimes for several days. No steam leaking, the water in the reservoir seems to be normal temperature, the radiator is not overly hot, and the AC keeps on blowing ice cold. Me thinks it is not really overheating, it just thinks it is. So where to start? Change the temp sensor first, or the thermostat? It seems the hoses are fairly firm, I don't believe they are collapsing from suction.
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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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Replaced HPFP 38,000 miles ago. Truck began going in limp mode without engine light, wrench came on in dash, gave codes for brake switch, anti-theft, some other weird codes. Had those codes cleared, ran for while then water separator came on, drained the water out, came back on. Read some forums, so I removed and cleaned the housing, cleaned off the sensor. Had code cleared and ran good for about a week. Then guess what engine light comes on, limp mode.
Went to Auto Zone, pulled code P0088. This truck runs awesome until limp mode. No other problems. I take it to the ford dealer, scanner pulled P0088 and the water separator code again. I have read alot of remarks about this P0088 code. Can there be another cause for pulling this code, only 38,000 miles later. I had them do the TSB 12-07-07 but I have also read it can only be done if the P0088 is the only code. I just really feel there is an underlying issue with these 6.4's.
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I have a 2008 F350 with a 6.4 Powerstroke diesel engine that just experienced total engine failure. It has around 65K miles.
There is a heavy burn star pattern on all 8 pistons, a few pistons are cracked, a few cylinder walls are scored, glow plugs are melted, both heads are cracked with multiple stress fractures in each head.
About 1 month previously, the transmission would not work in tow mode and caused the engine to go into limp home mode. The dealership just replaced the entire tranny as a warranty item. About 1 week before the engine failure, I put in a 5.25 oz bottle of Lucas injector cleaner with a full tank of gas.
The Ford dealership is saying that the star pattern on all 8 pistons is due to high pressure fuel overspray and is evidence that I had a tuner on this engine and that the warranty is invalid. I did not have a tuner. What might have caused this engine failure?
Also, they only ripped down the top half of the motor, not the bottom half. I heard this might have been caused by a cracked crank shaft, but Ford refuses to investigate this possibility.
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Ok just bought this truck ran fine. Put a sct tuner on that the truck came with and some how got the egr turned on. It had a egr delete so it was smoking and finally found it out that it had turned on but fixed it. Now we have another problem, it will start up and run fine and about 45 seconds it will start running rough and go into a limp mode. It will run rough and starts to die slowly and when it starts to die there is no throttle at all.
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I bought my 2015 in August of last year with 8K miles and here I sit at the dealership with 15K for the second time in 4 days.
Truck loses gauges while driving and throws all the warnings (tire pressure, temp, hill descent, and on and on). If I turn it off it won't start. I disconnected the battery first time it happened, about a month ago, and it restarted. Thursday it wouldn't start until the tow truck driver got it off the flatbed at the service center (go figure). This time I got it on video and parked it at the service center myself. I showed the foreman the video.
The service advisor told me it needed a software update last Friday when I picked it up, which is another way of saying they had no idea and didn't put much thought into it since it was running when they had it. The notes said they did a diagnostic, found no codes, and "drove it on a bumpy road" with no issues. Really?
This is extremely frustrating! I hope they actually do something this time. The damn thing started again before I left it with them!
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I've got a 2006 F350 5.4L.
The ABS light came on and it was throwing a 'rear speed sensor' code. I searched around and it seemed to be a common issue that the sensor goes bad and needs to be replaced.
I bought a sensor and replaced it, but in doing so, I saw that while the sensor was indeed bad (cracked) the wire right at the connector was corroded.
I replaced the sensor but the ABS light is still on the dash. Is it possible that they code simply needs to be cleared? I was able to read it with my OBD2 dongle and Dash Command App, but maybe I'm not able to clear it?
Or is it more likely that the corroded wire on the connector is the issue? (it wasn't fully corroded and I cleaned it up and sealed it.). It didn't look like I could pull the wires out of the connector, so I assume I'll need a new connector. What is the part number?
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My 2008 f250 6.4l just got out of the shop a week a go new small block and new pistons, throwing #1 constrabution code,map sensor and #1 cil misfire you can hear air come out of the intake, I am guessing valve train or lifter..... other problem two days after the truck throwing the codes i went to take it to the shop and would barely drive floored struggle to go 10mph put it in park rev up normal will go in reverse normal just no power in drive, no transmission codes, had it towed to the diesel shop, mech said might be a fail safe on transmission from the engine codes? it has egr/dfp h&s mini maxx tuner, the truck has 170k on body 11k on new engine before the new block that was put in last week.
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05 6.0 72,XXX miles. Will not start when cold (below 40ish) outside and engine is cold. Throws a P1378 code and no others (per the BullyDog Gauge Tuner that came with the truck). Checked the FICM with the voltmeter test on a morning it wouldn't start. Never dropped below 48 volts through the whole test. I can clear the code, try and start the truck and it comes back as soon as I try to crank it again. Warm days=no problems at all.
Oh yeah...I did go through the harness from the FICM to the injectors a while back and found a couple spots that were rubbing on various bolts. Peeled the insulation back and taped up the bad spots to keep from grounding something out so I don't think it's a harness issue. Also found a ground wire off on the back side of the FICM and reconnected that on the nearest valve cover bolt.
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I have a 2009 6.4L F250 with 153k miles on it. Yesterday I drove from downtown Dallas north to McKinney (about 40 miles) and truck was running fine. Left approx. 3 hours later for dinner and the check engine light came on and truck ran very sluggish with hardly any power. Had it checked at auto zone today and got the P040D Exhaust Gas Recirculation temperature A circuit high DTC. I can get the part but not sure if I can replace it myself.
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We are having an intermittent issue with car starting up and immediately throwing a CEL, red triangle and going into limp mode. Shutting off the car and restarting it sometimes resolves the issue. I'd love to be able to pull the logs from the car to see what is causing this issue.
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Its a 1999 f250sd 5.4l auto. Has code p1747. Truck shudders and almost dies when you drop it in gear, put it back in park idles fine. I have read all the post on here about this and checked wires from trans up to pcm look and test good. Tested plug c1048 wires with digital meter to body ground with battery unhooked and got 6.66k ohms on pin 11 circuit 925, 421 ohms pins 1 and 12. Plugged c1048 back to trans checked 925 w/y wire at plug c103 got 9.1 ohms back to trans. Is the epc solenoid bad or is it pcm. I think its epc but want to verify before i take trans apart.
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Having problem with oil cooler pump throwing the wrench light? Dealer says it cools the oil and mine could be clogged a bit.. cost of total job around 8-10 k. And take cab off.
It seems when engine gets hot wrench light comes on cause not cooling oil down properly... it overheated. Gauges were very high.. Once when I was in full boost towing a ranger up a hill. First time it ever happened.. pulled over for 5 mins than started temp went back normal and finished tow no problem after that cause I kept boost lower!
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2008, 5.4 liter, F250, with 6-speed manual transmission
My truck was running fine until I decided to clean my engine. I just wanted to remove the extra dust covering it, so I used a low pressure garden hose to wash away the dirt that had accumulated last winter and spring.
It started throwing codes like Fuel Rail pressure sensors, P0191, P0192. I had no power, and I could hardly drive the truck.
I figured I had some water in some connectors, so I checked around, but could not detect any moisture.
I kept driving it, and the problem got less severe. One warm summer day, I drove my truck for about an hour trip, and everything looked fine after this. Problem never came back.
I was even noticing that it was better on gas that ever before, I was doing 11liters/100km, in city driving.
Until one day (2 months later), I had to disconnect the battery to do some servicing on my truck (more that 30 minutes), and it started to run crappy again, having some piston misfire, throwing codes P2198 and P2196, (O2 sensors). No power, if I am very gentle on the gas pedal, I can manage it, but as soon as i try to accelerate, runs like crap, black smoke coming out of the exhaust.
The problem comes and goes, sometimes, the problem stops, and I can get going, no issues. Air filter is clean, even tried with no air filter, no differences., but it really sounds like bad air/fuel mixture.
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I've had the truck for almost a year. It had 2900mi when I bought it. It's got 18k on it now. A few weeks ago I stopped to get the mail and the dash started going crazy throwing every warning you could think of. I got back in and all the codes were gone. I figured it was a fluke until last week. It did it again. I let it run for a few minutes and decided to turn it off. It wouldn't start back up right away. After about 20min, it started and I drove straight to the dealer.
They had it for 2 days, cleared all the codes and couldn't replicate it. They said the codes were U codes and not real codes?? The next morning it did the same thing again. I took it back and after 3 days, they said they could only think that my AMP Powersteps were the cause. They disconnected the steps and wanted to keep it for a few more days. I said no and picked it back up. It made it 2 days and I got the codes again.
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I have a 1999 F-150 with the 4.2L engine. I recently did a motor swap as the original motor was bad. I bought this truck as a project truck and have enjoyed working on it.
When I did the engine swap back in May of this year, it took a while to work out all the little bugs and quirps. However, after a while of running the truck it threw a few codes. I replaced a lot of the emission components and no more codes for several months until last month the truck started throwing the infamous P0174 "too lean bank two"... I have replaced the pcv valve and all the hoses to include the little rubber boot under the front of the intake, all 4 O2 sensors, MAF sensor, EGR, DPFE, IAC valve, new wires and plugs to include coil pack, fuel pressure regulator, and all the vacuum lines that are under the hood.
The truck runs fine, has power, but about every couple weeks or so it throws this P0174 code. I know there are alot of threads on here about this problem and I have read many of them. It only throws the P0174 and not the P0171. I am wondering if there could be a problem specific to "bank 2" that I am over looking.
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This maybe a dumb question. But when do you use this feature? How many pounds should I start using the tow mode? I dont haul much. I just haul a 4place trailer with 4wheelers. And in the bed another 4 wheeler or camp gear. All the 4wheelers weigh over 650lbs wet and the trailer not too sure but its steel.
My truck doesnt have a hard time hauling, it shifts fine. Feels like its not even hauling anything. I did use to tow mode once but it seem it just keeps the rpm higher and I felt that the highter rpm was not needed when I was hauling.
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I was towing a fairly heavy trailer yesterday (around 10k) and laying into the throttle to gain some speed before a big hill when I completely lost power. It slowed me down to about 10 MPH.
I was able to drive home at very slow speeds and the only way to get over 10 MPH (only up to about 20MPH was to very lightly accelerate up to speed. Any hard acceleration and it cut me off to 10 MPH. No warning lights of any kind going off...
Truck has a Hypertech Max Energy programmer on stage 2.
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I have a 2009 F350 and use it almost exclusively for towing. Every time I stop to fill up or eat or whatever I have to push the tow haul button again when I start the truck- no big deal really just annoying at times because I don't always remember to turn it back on. Is there a way to have it turn on with the button and not turn off until I push it again (even after the trucks been turned off)? I suppose while we're on the subject same with the heated seats?
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