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Home >> Ford >> 2011 >> Focus S, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Powertrain DTC Charts & Descriptions - DTC P0218 Through DTC P0581 - (Except Diesel & Hybrid) >> DTC P0299: Turbocharger/Supercharger A UNDERBOOST Condition

DTC P0299: Turbocharger/Supercharger A UNDERBOOST Condition

P0299 - TURBOCHARGER/SUPERCHARGER A UNDERBOOST CONDITION

Description:  The powertrain control module (PCM) continuously monitors the turbocharger system for an underboost condition.
The PCM checks for a minimum throttle intake pressure (TIP) PID reading during engine operation, which indicates an underboost condition. This DTC sets when the PCM detects that the actual throttle intake pressure is less than the desired throttle intake pressure by 27.6 kPa (4 psi) or more for 5 seconds.
Possible Causes: 
  • Damaged turbocharger (TC) wastegate regulating valve solenoid
  • TC wastegate regulating solenoid valve stuck
  • Wastegate stuck open
  • Wastegate control hose open or plugged
  • Air leak between turbocharger and throttle
Diagnostic Aids:  Check tubing for obstructions, cracks and incorrect fitting connections.
Check the turbocharger wastegate regulating valve solenoid for correct operation.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST HN .