For Shop Owners

P0299 FORD - Turbo/Supercharger Underboost

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Faulty Injector Control Pressure (ICP) sensor
  • EGR system fault
  • Engine mechanical condition
  • Low oil pressure
  • Faulty Turbo/Supercharger
What does this mean?

Tech notes

There is a factory service bulletin for the following Ford models:

2003-2007 Ford F-Super Duty
2004-2007 Ford E-350, E-450
2003-2005 Ford Excursion

P0299 lack of power and turbo sticking on a 6.0 Powerstroke F250 diesel

User Submitted Video
What does this mean?

When is the code detected?

The Engine Control Module (ECM) has detected an error between the expected versus actual exhaust backpressure

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0299 FORD Description

The Manifold Absolute Pressure (MAP) sensor measures the pressure inside the intake manifold. The pressure in the intake manifold is affected by turbocharging output, engine speed, accelerator pedal input, ambient air temperature, and Barometric Pressure (BARO). A diaphragm within the MAP pressure sensor is displaced by the pressure changes that occur from the varying load and operating conditions of the engine. Under normal operation, then the lowest pressure that can exist in the intake manifold is equal to the BARO. This occurs when the vehicle is operated at idle or when the ignition is ON while the engine is OFF. The highest manifold pressure occurs when the turbocharger output is high. The manifold pressure range from 58 kPa (8 psi) when pressure are low to more than 296 kPa(42.7 psi) when pressures are high, depending on the BARO.
OBDII Code P0299 Ford - Turbo/Supercharger Underboost -

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P0299 FORD Comments

Help us improve Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P0299 Ford code? Have you replaced any parts?
Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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