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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> 2.0L - DTCS P0261-00 To P046C-00 >> DTC Troubleshooting >> P0299-00-Turbocharger/Supercharger "A" UNDERBOOST Condition >> Possible Causes

Possible Causes

Possible Causes
RESTRICTED AIR FILTER
INTAKE SYSTEM LEAK OR RESTRICTION
EXHAUST SYSTEM RESTRICTION
WASTEGATE VALVE STICKING
WASTEGATE SOLENOID CONTROL (+) CIRCUIT OPEN OR HIGH RESISTANCE
WASTEGATE SOLENOID CONTROL (-) CIRCUIT OPEN OR HIGH RESISTANCE
WASTEGATE SOLENOID
TURBOCHARGER (DRAGGING TURBINE)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .