P0048
Turbo/Supercharger Boost Control Solenoid Circuit High
2011-2011 Subaru Legacy 2.5L H4
Moderate SeverityPowertrainGeneric (SAE)
The 2011 Subaru Legacy is equipped with a 2.5L flat-4 engine. Below you'll find detailed p0048 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
High voltage detected in the boost control solenoid circuit.
Symptoms
- Check Engine Light
- Overboosting
- Reduced power
Common Causes
- Short to power
- Faulty solenoid
- PCM issue
Diagnostic Steps
- Test circuit voltage
- Check for shorts to power
- Test solenoid
Repair Notes
Repair short or replace solenoid.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0048 on Other Vehicles
Common Questions
What does code P0048 mean on a 2011-2011 Subaru Legacy?
P0048 stands for "Turbo/Supercharger Boost Control Solenoid Circuit High". High voltage detected in the boost control solenoid circuit.
What are the symptoms of P0048 on a Subaru Legacy?
Common symptoms of P0048 include: Check Engine Light, Overboosting, Reduced power.
What causes P0048 on a 2011-2011 Subaru Legacy?
Common causes of P0048 include: Short to power, Faulty solenoid, PCM issue.
Last updated: March 2026