OBD2 code P0045: Turbocharger/Supercharger Boost Control A Circuit/Open
"Boost control A" is the electrically driven actuator the engine control module uses to set boost pressure: depending on the engine a pulse-width modulated solenoid or vacuum conve
Detected Root Component
Turbocharger
Technical Component Diagrams
Turbocharger Layout
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Turbocharger Connector
Diag Expert technical diagram
Observed Symptoms
- Check engine light on
- Loss of power or reduced power mode
- Weak acceleration, noticeable turbo lag
- Overboost possible in rare cases
Possible Causes
- Connector at the actuator corroded or loose
- Wire broken or chafed through
- Solenoid coil in the actuator burnt out
- Fuse or ignition supply faulty
- Engine control module or separate actuator control unit faulty
Tools Required
Interactive Diagnostic
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Parts likely to be the cause (Moteur (général))
Moteur (général)
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Frequently asked questions about code P0045
What does code P0045 mean? ▾
OBD2 code P0045: Turbocharger/Supercharger Boost Control A Circuit/Open. "Boost control A" is the electrically driven actuator the engine control module uses to set boost pressure: depending on the engine a pulse-width modulated solenoid or vacuum conve
What are the symptoms of code P0045? ▾
Code P0045 may cause: Check engine light on, Loss of power or reduced power mode, Weak acceleration, noticeable turbo lag, Overboost possible in rare cases. The intensity of these symptoms varies depending on the vehicle and driving conditions.
What causes code P0045? ▾
The most common causes of code P0045 are: Connector at the actuator corroded or loose, Wire broken or chafed through, Solenoid coil in the actuator burnt out, Fuse or ignition supply faulty. A proper OBD2 diagnostic will pinpoint the exact cause.
Is it serious to drive with code P0045? ▾
Code P0045 has moderate severity (Warning). Short-term driving remains possible, but a prompt check is recommended to prevent worsening.
How do I fix code P0045? ▾
Start by reading the code with an OBD2 scanner, then follow the interactive decision tree on this page. Priority causes to check: Connector at the actuator corroded or loose, Wire broken or chafed through, Solenoid coil in the actuator burnt out, Fuse or ignition supply faulty. Difficulty: Medium · Estimated time: 30-60min.