Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-603C

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 higher 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
- Reduced boost pressure through full opening of the boost pressure control valve.

Possible source
- Pressure servo for the boost pressure control (BPC) valve is incorrectly adjusted
- Sticking boost pressure control (BPC) valve
- Damaged turbocharger (TC) control valve.

Fault symptom[s]
- Poor performance.