OBD-II code · Powertrain (generic)
P0045 Turbocharger/Supercharger Boost Control A Circuit/Open
Open circuit at the boost control solenoid/actuator A. The ECU cannot drive the wastegate or VGT vanes.
Is it safe to drive with P0045?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWiring break or unplugged connector
- PossibleSolenoid coil open
- Less likelyPin pushed back out of connector body
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Boost Control Solenoid, Actuator Wiring
Related codes
- P004ATurbocharger/Supercharger Boost Control B Circuit/Open
- P0042HO2S Heater Control Circuit Bank 1 Sensor 3
- P0043HO2S Heater Control Circuit Low Bank 1 Sensor 3
- P0044HO2S Heater Control Circuit High Bank 1 Sensor 3
- P0046Turbocharger/Supercharger Boost Control A Circuit Range/Performance
- P0047Turbocharger/Supercharger Boost Control A Circuit Low
- P0048Turbocharger/Supercharger Boost Control A Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.