Hey Everyone, coming up short on resolutions to this problem and am hoping someone could help. I am posting this for my dad.

His truck is a 2013 F-250 with the 6.7. He has 39k miles on it. He started the truck on Monday to move it out of the way of his motorcycle and noticed it had a check engine light on. No other symptoms noted. After 3 hours on the phone trying to help him pull the code, we finally got it. It is P0170. My dad stated last week that the truck did a regen the last time he drove it. He usually only tows with the truck. Nothing crazy. His service is impeccable and fully dealer maintained. He is suppose to leave on a trip tomorrow and doesn't have time for a trip to the dealer.

From what I've read, it doesn't appear to be serious, but there also doesn't seem to be a documented cause for this issue. His last fuel filter change was about 7k miles ago by the dealer. Nothing seems out of the ordinary from what I could tell.

Thoughts? I know some out there have experienced this, but no threads have documented resolutions.

Thanks!

 

could be a fuel trim issue or maybe plugged filters.


I'd change the fuel filters if possible and see if that does it.


Be sure to only use OEM fuel filters.

 

I'll have him give that a shot. He can't do that himself anymore, but should be able to take it in and get it done somewhere else.

 

otherwise maybe a diagnostic of the sensor for bank one.

 

I was having that issue of that code popping up on mine there for a while. No symptoms ever showed up like something was wrong, truck ran completely the same as when there was no engine light on. Long story short ended up taking it to the dealer when the light was on and they had to call the ford techs which told them they just had to reflash the ecm which they did and I haven't had the light come on since. Hopefully that is helpful.

 

Thanks Everyone. After lots of research, I've concluded that this is likely a minor issue if an issue at all. I had my dad clear the code with the scanner he bought and he left for his trip. Fingers crossed it doesn't come up again. As of last night, truck was running great and he had 500 miles on it since the light came on. So far so good. Fingers crossed.....

 

It won't shut him down on the side of the road and that is the main thing.


Try the reflash if it comes back.

 

Js139,

sorry to join the party late. There is info here:

https://www.ford-trucks.com/forums/1410522-code-p0170-power-fuel-trim-bank-1-a.html

the big bugaboo on tge check engine light is that it can come on for lots of reasons that aren'the immediate service required items. And unfortunately if you do not have a reader to tell you, and you have one but don't
erase the fault, the light stays on. Meanwhile, down the road a real "immediate service" need arises, but the light is still the same light.

since last post there have been several instances where dealer used camera on a wire to "see" that the paper seal/cap under the screw on cap of fuel additive was at the bottom of the fuel tank. Pull tank, remove float assembly/sending unit and fish out the paper, reinstall, presumably with a new seal on the sending unit.

after a few flashes and an injector, mine went away for 10k miles. It is now back intermittently about 300 miles, then I made it 1,000. I just read to confirm same code, erase, and forget about it.

before I bought Torquepro and figured it out, I drove over 1k miles with the light on. That was after several trips to the dealer where they saw light and code but could not fix it other than flash and erase.

 

Thanks for the information. This is pretty much consistent with everything I have found on other threads. Through all of this, I have not found a single thread or person that has accurately diagnosed the cause of this light and resolved the issue. Everyone simply erases the code and hopes it doesn't come back and/or reflashes the PCM and hopes for it to not come back. I personally don't like this strategy and have a hard time recommending that to my dad. That said, I have no better options for him. I told him if it comes back (he now has a scanner that can check it), leave the code on and take it to his dealer to document the issue. He doesn't use additive, so I don't think that is it.

Anyways, I appreciate the information. I hope that someone will figure this one out at some point.

 

most likey the threshold that sets the code is too tight.

 

Apparently if they see the paper cap in the tank on camera, and remove it at owners expense, all is well... for how long, who knows, but none of the few that got this done have reported it coming back.

 

I had this code for awhile, erased it a few times only to have it come back on. After a little research, I pulled the prefilter and did not replace it. Light has not come on since. Fwiw

 

Prefilter? You mean the rail mounted fuel filter? If that's the case, that's a bad idea in my opinion.

 

this is in reference to the foam filter insert that is with the air filter

 

oh ok, got it. Sorry, was thinking this was about fuel.