E1044-2 High Intake Manifold Pressure : moderate severity This pressure is a variable value that is calculated by the ECM. The resulting value is dependent on the operating conditions of the engine.
I'll PM you the test procedure for the wastegate actuator.
Probable Causes
Turbocharger wastegate
Wastegate regulator
Recommended Actions
Turbocharger Wastegate
Disconnect the output rod in the wastegate actuator from the lever that operates the wastegate.
Operate the wastegate lever by hand and check for full and free movement.
Check that the output rod in the wastegate actuator is biased towards the retracted position.
Connect the output rod in the wastegate actuator to the lever that operates the wastegate.
Check the operation of the wastegate actuator. Refer to Systems Operation, Testing, and Adjusting, "Turbocharger - Inspect".
If the wastegate or the wastegate actuator is not operating correctly, replace the turbocharger. Refer to Disassembly and Assembly, "Turbocharger - Remove (First Stage Turbocharger)" and Disassembly and Assembly, "Turbocharger - Install (First Stage Turbocharger)".
Wastegate Regulator
Use the electronic service tool to check for diagnostic trouble codes that relate to the wastegate regulator. Rectify the cause of any related codes. Refer to Troubleshooting, "Diagnostic Trouble Codes".
