P0299 Underboost - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 09-27-2013, 06:49 AM Thread Starter
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P0299 Underboost

Truck has thrown the code twice. I've been able to clear it and it stayed off for a number of weeks. Than came on again the other day. First time it was under acceleration. I wasn't driving it the second time.

I usually try to drive the truck hard enough to cycle the vanes, but that may only be once every two weeks. And it will just be once or twice on a drive that it's at WOT.

Haven't noticed any power loss nor have I heard any boost leak anywhere.

Leaning towards the vanes sticking due to the truck sitting for a week or two at a time.

Thoughts?
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post #2 of 3 Old 09-27-2013, 07:08 AM
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Probably a good assessment. Take the turbo out and clean it.... if there is heavy pitting around the vanes you will probably need a new turbo... the unison ring could be worn out as well. Hopefully it just needs a good cleaning!
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post #3 of 3 Old 11-15-2013, 06:29 AM
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Pretty much in the same circumstance, just wondering how you made out with the turbo, cleaned and fine? unison ring? rebuild or new one? thanks...
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