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Home >> Jeep >> 2025 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 58 (2.0L - DTCS P0298 To P0304) >> DTC Troubleshooting >> P0299 Turbocharger UNDERBOOST >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2025 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
RESTRICTED AIR FILTER
BOOST SYSTEM PRESSURE HOSES RESTRICTED OR LEAKING
INTAKE SYSTEM LEAK OR RESTRICTION
EXHAUST SYSTEM RESTRICTION
WASTEGATE VALVE STICKING
WASTEGATE SOLENOID CONTROL (+) CIRCUIT OPEN/HIGH RESISTANCE
WASTEGATE SOLENOID CONTROL (-) CIRCUIT OPEN/HIGH RESISTANCE
SURGE VALVE LEAKING OR STUCK OPEN
FAULTY WASTEGATE SOLENOID OR TURBOCHARGER (DRAGGING TURBINE)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to:  2.0L - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .