P0046
Turbocharger/Supercharger Boost Control A Circuit Range/Performance
Generic code
Injector Circuit
High severity
Hard repair
Free on OBD DashX
Want real-world data on P0046?
See which problems come with P0046, how often it shows up in other vehicles, and how to fix it — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
What P0046 means
- The fault code P0046 indicates that there is an issue with the circuit that controls the boost pressure of the turbocharger or supercharger. This may cause the engine to run poorly or not start at all.
Possible symptoms
- Lack of power or acceleration
- Illuminated check engine light
- Poor fuel economy
- Engine runs rough or stalls
- Turbo lag or delayed acceleration
Possible causes
- Faulty boost pressure sensor
- Failed turbocharger wastegate
- Faulty turbocharger bypass valve
- Loose or corroded electrical connections
- Failed engine control module (ECM)
Related parts
- Turbocharger/Supercharger: Turbocharger compresses in more air into the engine, hence producing more power output. Problem leads to power loss
Possible solutions
- Replace the boost pressure sensor
- Replace the turbocharger wastegate
- Replace the turbocharger bypass valve
- Check and repair any damaged wiring or connections
- Tighten or clean any loose or corroded electrical connections
- Replace the engine control module (ECM) if necessary
Free on OBD DashX
P0046 on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
Open P0046 No sign-up needed · available in 10 languagesScan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.