Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-603D

Condition
The engine control module (ECM) checks the boost pressure. The diagnostic trouble code (DTC) is stored if the measured boost pressure from the boost pressure sensor (actual value) is lower than the control module target value (desired value).
The diagnostic trouble code (DTC) can be diagnosed when the engine speed (RPM) and load are above a certain value.

Substitute value
- None.

Possible source
- Damaged turbocharger (TC) control valve
- Damaged intercooler.
- The hoses between the pressure servo for the boost pressure control (BPC) valve and the turbocharger (TC) control valve have come loose or are blocked or damaged
- The hoses between the turbocharger (TC) control valve and the charge air pipe (between the turbocharger (TC) and the charge air cooler (CAC)) are blocked or damaged
- Pressure servo for the boost pressure control (BPC) valve is incorrectly adjusted
- Damaged boost pressure control (BPC) valve pressure servo
- Sticking boost pressure control (BPC) valve.

Fault symptom[s]
- Poor performance.