P2006moderate severityPowertrain
Intake Manifold Runner Control Stuck Closed Bank 1
on 2004 Subaru Legacy 3.0L H6 · AWD
What this code means
The intake manifold runner flaps are stuck closed on bank 1, restricting airflow at higher RPM.
Symptoms
- Reduced high-RPM power
- Check engine light
- Hesitation on acceleration
Common causes
- Broken runner flap
- Actuator jammed
- Carbon deposits
- Linkage failure
Diagnostic steps
- Inspect runner mechanism
- Test actuator movement
- Check for physical obstruction
Repair notes
Clean or replace runner control mechanism.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1