Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition
Diagnostic trouble code (DTC) ECM-6805 is stored if the pressure measured by the boost pressure sensor is higher than a calculated desired value. This is interpreted as a fault by the control module. The fault is diagnosed by the control module at high engine loads.

Substitute value
Reduced throttle angle.

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

Fault symptom[s]
- Poor performance.