P0299

P0299

This is a discussion on P0299 within the F150 Ecoboost Problems forums, part of the F150 Ecoboost Forum category; I did a decent amount of searching before posting.. Had this issue traveling up to Georgia about a month ago. Iím tuned but otherwise stock. ...

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Thread: P0299

  1. #1
    Ecoboost Sr Member avwizz's Avatar

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    P0299

    I did a decent amount of searching before posting..

    Had this issue traveling up to Georgia about a month ago. Iím tuned but otherwise stock. I wasnít towing anything, but did notice the CEL came on and I read the code (p0299). I cleared it to see what would be happening when it came back on again. Eventually it did however nothing big happened. I did a little searching and pointed at a possibility of a solenoid (I believe) was a starting point to check. Theyíre cheap so I replaced it.

    Fast forward to tonight. Weíre traveling on the highway home with our TT and I notice it just wonít go past 6psi regardless of gear and struggling to keep 70. No CEL however. I pull over and restart the truck thinking some computer has gotten jammed up or something. Restart and go and all the power is back, hitting 18 psi getting up to speed no problem. About 5 minutes in same thing but this time it throws the P0299 code and weíre back to about 5.5 psi max.

    Thoughts on where to look next? I donít imaging itís a leak somewhere (but havenít checked) since why wouldnít it limit the boost all the time? Could I have just one side of the turbos going bad?


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    Eco-Beast noodles's Avatar

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    P0299 is an underboost code, caused by your turbos not being able to produce/hold the desired boost as commanded by the PCM.
    Mostly happens when under load. Especially noticeable when towing.
    I'd start with checking intake pipe connections and vacuum lines.
    Mikedick77 likes this.
    13 SuperCrew Ruby Red 302A, 4x4 6.5 box, 3.31, Roush 22's. Twin catch cans, "leveled" with Bilsteins (-2 front, -3 rear), AirLift, SCT. Other's may have displacement on demand... I have an endless supply of torque at my right foot's demand.


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    Ecoboost Sr Member hammonds42's Avatar

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    Following. Currently have the same issue. Replaced solenoid on top of intake with no difference.

    Sent from my SM-G955U using Tapatalk

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  5. #4
    Ecoboost Sr Member avwizz's Avatar

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    Quote Originally Posted by hammonds42 View Post
    Following. Currently have the same issue. Replaced solenoid on top of intake with no difference.

    Sent from my SM-G955U using Tapatalk
    I did that a couple weeks ago and did not solve the issue however I did swap out the EBOV today and will be towing tomorrow to see if that took care of it. Mine did end up having a tear in the orange membrane. We shall see.


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    Ecoboost Pro Mikedick77's Avatar

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    I'd be pretty optimistic that you solved the issue with that if I were you. Let us know. You may end up helping the next guy that comes along.
    noodles likes this.
    2013 Eco XTR 4x4 Super Crew 5.5 bed 3:31 Rear
    Stock, Weep hole, 160 degree T-Stat, Autolite Iridium XP5863 gapped properly, Castrol Magnatec 5w-30, and 93 octane
    NO OIL LEAKS!!

    Purrs like a kitten! It's called maintenence. This shouldn't surprise people.

  7. #6
    Ecoboost Sr Member avwizz's Avatar

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    Quote Originally Posted by Mikedick77 View Post
    I'd be pretty optimistic that you solved the issue with that if I were you. Let us know. You may end up helping the next guy that comes along.
    I got to take the TT out today for about 60 miles and no issues. Looks like that solved the issue.


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    Eco-Beast noodles's Avatar

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    Quote Originally Posted by avwizz View Post
    I got to take the TT out today for about 60 miles and no issues. Looks like that solved the issue.


    Sent from my iPad using Tapatalk
    That tear would definitely cause a boost leak, especially under heavy load.
    Glad you got it sorted.
    Mikedick77 likes this.
    13 SuperCrew Ruby Red 302A, 4x4 6.5 box, 3.31, Roush 22's. Twin catch cans, "leveled" with Bilsteins (-2 front, -3 rear), AirLift, SCT. Other's may have displacement on demand... I have an endless supply of torque at my right foot's demand.


  9. #8
    Eco-Beast Sirikenewtron's Avatar

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    Same thing I had in my old 2013 3.5, made a huge difference after I replaced it

    Sent from my SM-G965U using Tapatalk
    Traded the old 2013 XLT S. Crew cab 4x4 on its 4the engine
    For a 2017 crew cab sport stx 2.7 and couldn't be happier

  10. #9
    Ecoboost Sr Member avwizz's Avatar

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    Quote Originally Posted by Sirikenewtron View Post
    Same thing I had in my old 2013 3.5, made a huge difference after I replaced it

    Sent from my SM-G965U using Tapatalk
    Iím not sure about you but it took care of my stumble on acceleration issue too. I wanted to drive a bunch to make sure that wasnít just my imagination but itís back to silky smooth.


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    Eco-Beast Sirikenewtron's Avatar

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    Quote Originally Posted by avwizz View Post
    Iím not sure about you but it took care of my stumble on acceleration issue too. I wanted to drive a bunch to make sure that wasnít just my imagination but itís back to silky smooth.


    Sent from my iPhone using Tapatalk
    Very nice.
    Mine mainly just felt sluggish off the line bit once I found the tear and replaced it it was back to spinning tires

    Sent from my SM-G965U using Tapatalk
    Traded the old 2013 XLT S. Crew cab 4x4 on its 4the engine
    For a 2017 crew cab sport stx 2.7 and couldn't be happier

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