Diagnostic trouble code (DTC) information

Condition 

If engine speed (RPM) is above 3500 RPM and the engine is operating at a high load, and if the boost pressure (from the boost pressure sensor) is higher than a designated value, which at maximum boost pressure is approximately 20 kPa (2.90 psi) above normal boost pressure, this is interpreted as a fault and diagnostic trouble code (DTC) ECM-6805 is stored.

Substitute Value 

reduced boost pressure

Possible Source 

• hoses between turbocharger (TC) and turbocharger (TC) control valve respectively turbocharger (TC) control valve and pressure servo are loose or are blocked/damaged
• faulty turbocharger (TC) control valve
• faulty boost pressure control (BPC) valve pressure servo
• sticking boost pressure control (BPC) valve

Fault symptom[s] 

• none