P0045 - Turbocharger / Supercharger Boost Control Solenoid 'A' Circuit Open
A boost control solenoid is normally used to operate either a variable geometry turbocharger mechanism or a standard turbocharger wastegate mechanism.
Fault Code Explained
Although this fault code indicates that the Turbo Boost Control Solenoid circuit is open, this does not always mean a complete break in the circuit.
The fault code can also be set for the following reasons:
- A power supply issue (no supply Voltage)
- A faulty component
- Check supply Voltage at solenoid
- Check solenoid control circuit