P3017high severityPowertrain
Variable Valve Lift System Performance Bank 1
on 2015 Subaru Impreza 2.0L H4 · AWD
What this code means
The variable valve lift system on Bank 1 is not meeting performance expectations. This system changes valve lift height to optimize power and efficiency.
Symptoms
- Check Engine Light
- Loss of power at certain RPM ranges
- Unusual engine noise during lift change
- Poor fuel economy
- Engine feels rough during transition
Common causes
- Worn valve lift mechanism
- Oil pressure insufficient for lift change
- Control solenoid partial failure
- Mechanical wear in rocker assembly
- Incorrect oil viscosity
Diagnostic steps
- Monitor valve lift PID during acceleration
- Check oil pressure at lift actuator
- Command lift change and measure response time
- Inspect oil condition and viscosity
- Listen for mechanical noise during transition
Repair notes
Replace variable valve lift mechanism or control solenoid. Use manufacturer-specified oil viscosity.
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