P0045moderate severityPowertrain
Turbo/Supercharger Boost Control Solenoid Circuit/Open
on 1998 Subaru Forester 2.5L H4 · AWD
What this code means
The PCM detected an open circuit in the turbocharger or supercharger boost control solenoid.
Symptoms
- Check Engine Light
- Loss of boost pressure
- Reduced power
- Limp mode
Common causes
- Faulty boost control solenoid
- Wiring damage
- PCM failure
- Corroded connector
Diagnostic steps
- Test solenoid resistance
- Inspect wiring
- Check vacuum lines
- Command solenoid with scan tool
Repair notes
Replace boost control solenoid or repair wiring.
Other Powertrain codes on this vehicle
P0001
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P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
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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