P004B - Turbocharger/Supercharger Boost Control Solenoid 'B' Circuit Range/Performance
A boost control solenoid is normally used to operate either a variable geometry turbocharger mechanism or a standard turbocharger wastegate mechanism.
Fault Code Explained
The ECM has detected that the circuit signal is either outside of it’s normal operating parameters or is incorrect for the current operating conditions
- Check supply Voltage at solenoid
- Check solenoid control circuit