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.