Ford F-150 (2009-2014) :: Code P0078 - Stumble / Miss No Power
Nov 14, 2015
OK, 4th time in a week that my truck has had this problem... Seems to only be when the truck is already warmed up, restarting after sitting for a few minutes. Starts up just fine, but as soon as I drop it into gear it begins to stutter and stumble, running rough as can be and absolutely no throttle response. I have to kill the engine and restart the truck for it to correct itself, but the restart takes up to 5 seconds of extended cranking to finally fire up. Today is the first time I actually got a CEL and a code: P0078. Only had the truck 8 days now...
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2001 V10 160000 miles.
1st happened Wednesday on way back. Temps all fine but had been in stop and go traffic earlier. Truck was on cruise and felt like fuel cut. I disengaged cruise. Throttle would keep it running and within 5-10 seconds it caught and ran fine.
Connected and reconnected all injectors, coil connections, tb and MAF connections. Nothing noted loose. No codes on OBD reader.
Drove around town last couple days no issues. Today towing three dirt-bikes about 45 miles. towards the end of the 45 miles. she stumbled as we crossed an intersection. Then caught and ran fine. Did it twice on way back home towards the end of the trip.
Had OBD reader in gauge mode with ignition advance, tp sensor, voltage and gallons per hour showing. None seemed to change when it stumbled.
Fuel pump is about 2 years old. Coils maybe 4 or 5 years old. Aftermarket. No codes on OBDII reader.
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A couple questions I have about my truck. I'm still new to the F150.
First, my truck has an Ecoboost and I have a slight stumble/hesitation when you start the truck cold. It clears up within 10 seconds and doesn't seem to affect drivability whatsoever.
Second, it seems that only my driver side mirror has the "dimming feature" to it. Is this normal?
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I have a 2013 F150 4x4 with a 6.2 and it has a slight miss at idle. It's done this since new and over the 20kms it has now I've been given the round around on it from 2 different dealers. I'm told there is no code so they can't do anything. I'm thinking maybe a coil? Or perhaps injector?
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Truck has a slight miss at 65k when in 6th at low rpm and also when sitting still. Wanting to replace the spark plugs. The truck has Motorcraft CYPS 12Y in it which shows up as SP519. No one carries those anymore. What's the next best thing?
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2003 F150 5.4 72852 miles
I have a Rough Idle & sometimes a hesitation or stumble on acceleration. I cleaned the MAF & IAC motor & Air & Fuel Filters are new. I got a 20890 scanner & ran test 6 53 as suggested in many posts by BlueGrass. Here are My results & what They Convert to.
1 00F5 .3675
2 0051 .1215
3 0000
4 0000
5 00A3 .2445
6 0000
7 0000
8 0000
I'm guessing the cop's are ok & probably need plugs? I was hoping to just swap a coil. Too cold to do plugs & truck won't fit in my garage.
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This is more of an annoyance than a threat to driveability (so far) but it has me and the mechanics I deal with stumped. 94 GMC 350 with about 175 thousand miles. Prior to my emissions test I cleaned and gapped the conventional plugs, inspected the cap and rotor and gently cleaned off a small amount of accumulated 'snow' on the contact points and put a couple of cans of Seafoam in the tank. I passed the test without issue but for some unknown reason the truck has developed an irregular stumble at idle especially when hot.
I replaced the plugs and the stumble became less noticeable but still there. Mechanic has verified no problem with cap and rotor, ignition wires, coil, PCV valve, coolant temp sensor but did discover a very small leak in the intake manifold gasket which has been remedied but with no effect on the stumble. I had the truck out for a two hour highway drive today at sustained speed of 70mph and it ran beautifully but soon as I came back into town and hit the first stop light I noticed the stumble plus the tail pipe is too sooty after that much hwy driving. There are no stored codes and the SEL has never come on.
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What is the code for an FX4 is? Reason I ask is when I go online to Ford dealer inventory listing it shows something like "F150 4X4 SS S/C" but I don't see anything like "FX4."
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I have a 2011 ecoboost with 69000 miles and I am starting to get the dreaded P0016 code along with the occasional P0299. I am almost done making payments on it but I am hesitant about sinking the kind of money that it takes to repair the timing issues. SO the big question, is it worth keeping and making the repair or should I trade it and get a new 2016??
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I recently bought an 09 Ford F150 Fx4 and didn't get the door code from the owner. I looked and found what I think is the door lock control module above the fuse panel but the only 5 digit code doesn't unlock the door. What I can do the get the code?
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My truck ('10 4x4 w/5.4l, 65k miles) gave a P2096 this past weekend. Cleared it and drove around for a while. Today it threw the same code. No other codes present, just P2096.
I did look under the truck and it seems pretty easy to get to the two sensors. Is it worth swapping them to see if the code changes to the other side?
Truck idles and accelerates just fine. Fuel mileage seems to be down a bit, but the air filter is very dirty and I will be replacing that this week.
I have seen you can check the sensor by heating it and measuring the voltage. Seems easy enough to do, but do you create other problems from that?
I did notice that the connector to the mass air flow sensor is cracked, probably from checking the air filter. I would think if that was the issue it would be showing some MAF code.
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I just bought a 2010 f150 and it came with the single button remote start. I've been reading lots of posts about remote start but none with my issue. Mine when you push the button the horn beeps, ignition comes on, the seat slides forward, then the horn beeps just one time again, and it just sits there with the radio playing and not running. Everyone else is getting a 3 beep error code and I'm getting just the one beep.
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Does the 2011 6.2 have a DPFE sensor? If so where is it located? Codes are lean bank one and two and random misfire. Suggestions I have read online are replace DPFE sensor. I don't think maybe there is one on a 2011 6.2. Who have had it and had it fixed. Other things I see are clean the MAF sensor. Look for vacuum leaks.
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My daughters 2009 ford escape will turn over fine but won't start. Hooked up code reader and it read p0690. I am trying to get a feel for what this really is. It seems to me a spark or fuel issue but that is not part of that code from what've read.
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I'm having issues when shifting into reverse and I it goes into limp mode when the wrench light shows up. This will not happen when shifting into Drive. When in limp mode I get engine code P0720. This calls for a bad Output Speed Sensor and my research says the sensor is on the back of the transmission but I cannot find any sensors on the transmission. there are several connectors clipped to it but I don't see any bolted in sensors. Also I cannot find a replacement sensor anywhere so I'm wondering if this is a generic code.
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He has a 2013 F-150 XLT with the Ecoboost. He has 29,000 miles on the truck.
He is ~1,300 miles into his trip; and has about another 4,500 to go! On Friday, his check engine light came on (while towing). The next day it went back off. Yesterday, the light came back on (while not towing this time). He took the truck into a Ford Dealer in Rapid City, SD this morning. The CEL light was still on this morning when he arrived at the dealership. The dealership said the code is P0299 - Turbo Underboost.
They said they've run tests and can find nothing wrong. Naturally, he is not very happy being this far from home with 3 more weeks of vacation left and his truck acting up. Especially since the CEL light is on but the dealer can find nothing wrong. I'd be puckered-up too!
Experienced this Turbo Underboost condition? What was the cause? How can the CEL light be on but the dealership not be able to find a problem?
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2010 f150 with 5.4 catalytic converter. Engine light has been going on and off for the past couple of months. Had the code read and its says bank one catalytic converter. Ford dealer said to replace the 02 sensors. Had that done but light still comes on and off with same code. Could there be something wrong with the sensor or should I just have the CC replaced also. I just don't understand why it would come on for a few days and then not come on for a few days if its the CC?
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The last few days I've started getting the Wrench Light on my dash panel upon starting the truck and trying to put it into gear. I first noticed this on a cold morning and got the wrench but the truck went into Reverse and once I got going I was only in 3rd gear. I started and stopped the engine a few times and finally got it going. Since then it seems to do it all the time whether hot or cold. Tonight I noticed that if i start the engine and just go directly into Drive. I don't have the issue but if I ever go into Reverse it goes into limp mode and i get the big yellow wrench again. I only have engine Code P0720 which seems to refer to a speed sensor. I can't seem to find the sensor listed on the typical auto part websites.
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2010 4x4 F150 Lariat 5.4 L, have been working on throttle response problems off and on for a few months. Initially got p0404 codes, and replaced the accel pedal assembly, now graduated to p2135 code, and stall at idle after a highway trip. Wondering if this may be a issue with aftermarket air filter causing misread errors on sensors. Had it to the dealer, with out any real remedy.
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I just bought a new to me, '09 F-150 4X4. It is plush on the inside and didn't have too many miles on it. One thing that was lacking in the owners manual or any other material in the owners package was the code to unlock the doors. The local Ford dealer wants to charge to get the code for me. I was told there was a site one could go in the internet, plug in some information about the vehicle and the code would be displayed.
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I have a 2009 ford f150 4.6l 3v v8 standard cab with about 53k miles on it.
Recently the check engine light came on so i went to autozone to have the codes pulled for free, it says i have a small evaporative leak.
They said may be the gas cap, but the thing is, i have a quick fill cap that came in stock with truck so the gas cap isnt even needed.
I've looked under the hood, and noticed that there is little pool of oil on top of the valley of the engine on the passenger side of the engine, could it possibly be the PCV hose that is bad and be related to the evaporative leak code? or its unrelated and i have a bad gasket for the valve cover?
It isn't affecting the performance of the engine,.. yet. I have a road trip for my work coming up very soon and i wanted to try to fix it before then.
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