DTC P0234: Turbocharger/Supercharger A OVERBOOST Condition

WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2013 Lincoln Navigator, 2013 Lincoln MKZ, 2013 Lincoln MKX, 2013 Lincoln MKT, and 2013 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0234: TURBOCHARGER/SUPERCHARGER A OVERBOOST CONDITION

Description:	This DTC sets when the actual throttle intake pressure is greater than the desired throttle intake pressure by 27.6 kPa (4 psi) or more for 5 seconds. A maximum throttle intake pressure (TIP) PID reading during engine operation indicates an overboost condition.
Possible Causes:	Damaged turbocharger (TC) wastegate regulating valve solenoid Damaged wastegate adjusting rod TC wastegate regulating solenoid valve stuck Wastegate stuck closed Wastegate control hose open or plugged Incorrect wastegate adjustment
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 .