DTC P0661: Variable Intake Manifold Driver: Notes

Diagnostic information - DME (DFI) control unit 

INFORMATION 

• On 981S  and 991S  vehicles without Power Kit (X51)  , the variable intake manifold solenoid valve switches the tuning flap. 
• On vehicles with Power Kit (X51)  , the variable intake manifold solenoid valve switches the intake manifold flaps ahead of the intake valves. 
• On vehicles with Power Kit (X51), variable intake manifold solenoid valve 2 actuates the tuning flap.