DTC P0234: TURBO BOOST LIMIT EXCEEDED Monitor & Set Conditions Turbo boost limit is monitored when the ignition is on. DTC may be stored if Engine Control Module (ECM) senses engine speed is greater than 2200 RPM with no intake air pressure sensor out of range DTCs present. Possible Causes Mechanical Wastegate Failure Wastegate Stuck Testing 1. Turn ignition on with engine off. Using DRBIII(R) scan tool, check for DTCs. If DTC