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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van SPONSORED BY:

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Old 08-03-2009, 10:18 PM
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Jim83 Jim83 is offline
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Unhappy Trouble code PO299 Turbo charger underboost

What does this mean???

i have 60000 miles on it, no real problems so far but i noticed it had less power then usual and ran my superchips scanner and this is what i found.
Trouble code PO299 which means turbocharger underboost when i look it up.

Thanks
~jim
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Old 08-03-2009, 10:21 PM
jboczar jboczar is offline
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Can actually mean under/overboost, so many things can be cause this:

Fuel Pressure
High Pressure oil concern
Turbocharger
Exhaust Leak
Egr valve
Air intake restriction
VGT Actuator

What year truck and how many miles? Checking egr valve is always a good easy place to start. 2 8mm bolts, turn sideways, pry up on tabs.
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Old 08-03-2009, 10:34 PM
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justa had the egr replaced.
but i did have to change the fuelfilter today because they were so clogged up. that is prbly why it set the code off
my trck is a late 04

thanks for the quick reply
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Old 08-04-2009, 01:04 AM
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In most cases where this code shows up it is because the vains in the turbo are starting to stick. Like jboczar says it can be an overboost or an under boost. Your truck is a 2004 which means there is no boost gauge. You may consider putting one in.
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Old 08-04-2009, 04:40 AM
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When my friend had this code pop up on his 04 Excursion last year, the dealership replaced the entire turbo. Now that you're probably out of warranty, hopefully it's something more simple and you can get away with just cleaning the veins of the turbo to save some cash.
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Old 08-04-2009, 07:41 AM
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Quote:
Originally Posted by Jim83 View Post
justa had the egr replaced.
but i did have to change the fuelfilter today because they were so clogged up. that is prbly why it set the code off
my trck is a late 04

thanks for the quick reply
If you run your fuel filters until they clog up, then you will have injector problems. No ifs, buts, or maybes. Low fuel pressure KILLS the injectors. When you have even one fuel injector operating poorly, you will get more soot generated. This can increase the chance of clogging up turbos, EGR systems, and sensors.
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Old 08-04-2009, 07:41 AM
 
 
 
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