P0039
Turbocharger Bypass Valve Control Circuit Range/Performance
Generic code
Injector Circuit
High severity
Hard repair
Free on OBD DashX
Want real-world data on P0039?
See which problems come with P0039, 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 P0039 means
- The fault code P0039 indicates that there is an issue with the circuit that controls the bypass valve for the turbocharger or supercharger. This may cause a decrease in engine performance and/or fuel efficiency.
Possible symptoms
- Decreased engine performance and/or fuel efficiency
- Illuminated check engine light
- Whining or hissing noise from the engine
- Boost pressure may be erratic or inconsistent
Possible causes
- Failed bypass valve
- Faulty wiring or connections in the circuit
- 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 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
P0039 on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
Open P0039 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.