6.0L P0299 code
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Joined: Jun 2013
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6.0L P0299 code
Well as I hate seeing the check engine light come on, on any of my vehicles I found the infamous P0299 under boost code. No cracks in the hoses, truck has 112,000 miles so I wouldn't think the turbo would be that bad of shape though the previous owner used it for construction and 5th wheel towing. I sprayed a hell of a lot of Liquid Wrench into the exhaust to try and hit the vains to lubricate and derust the interior of the turbo. The interior of the downside just had normal surface rust as all down pipes should have. Couldn't see the condition of the vains since I didn't remove the turbo but instead just took of the down pipe to just spray inside. As I was cleaning up I remembered that there are no clamps holding the other side of intake filter on the side facing the firewall. Part of a reason that may throw the code for the P0299 is intake restriction or leak. So now don't know where I should turn kind of confused on what I should do next. 
Logistics Pro
Joined: Dec 2004
Posts: 4,138
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From: South Weber, Utah
<p>I would start by pulling and cleaning the MAP sensor hose and nipple where it connects to the intake, the map sensor is located above the evaporator housing on the passenger side and is connected to the passenger side of the intake manifold via a rubber hose. Then pull the EBP sensor and run a piece of stiff weed whacker line through the tube it connects to and into the exhaust manifold to make sure it's clear, the EBP sensor depending on the year of your truck will be mounted just below the FICM and is connected to the front of the drivers side exhaust manifold via a metal tube, if it is not there it will be mounted to the thermostat housing. The next step would be turbo removal, disassembly of the exhaust side and a thorough cleaning. Also check the end caps of the intercooler and make sure the rubber seal hasn't blown out.</p>
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