Diagnostic trouble code (DTC) information

Condition 

Diagnostic trouble code (DTC) ECM-6806 is stored if the control module deployment of the turbocharger (TC) control valve is 100 % (the control module request maximum pressure) and the measured boost pressure (from the boost pressure sensor) is lower that a calculated desired value. The fault is diagnosed by the control module when the engine speed (RPM) and load are above a certain value.

Substitute Value 

Reduced boost pressure.

Possible Source 

• Air leakage in the intake system.
• Pressure servo for the boost pressure control (BPC) valve is incorrectly adjusted.
• Sticking boost pressure control (BPC) valve
• Faulty turbocharger (TC) control valve.
• Damaged turbo charger (TC).

Fault symptom[s] 

• Poor performance.