P0045
Turbo/Supercharger Boost Control Solenoid Circuit/Open
2001-2003 BMW 525iT E39 2.5L I6 🇷🇺
Moderate SeverityPowertrain
Description
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.
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
P0045 on Other Vehicles
Common Questions
What does code P0045 mean on a 2001-2003 BMW 525iT E39?
P0045 stands for "Turbo/Supercharger Boost Control Solenoid Circuit/Open". The PCM detected an open circuit in the turbocharger or supercharger boost control solenoid.
What are the symptoms of P0045 on a BMW 525iT E39?
Common symptoms of P0045 include: Check Engine Light, Loss of boost pressure, Reduced power, Limp mode.
What causes P0045 on a 2001-2003 BMW 525iT E39?
Common causes of P0045 include: Faulty boost control solenoid, Wiring damage, PCM failure, Corroded connector.