The P0039 trouble code is related to the turbocharger or supercharger bypass valve control circuit. It indicates that there may be a range or performance issue with the control circuit responsible for managing the bypass valve in the vehicle’s forced induction system. This code is typically found in vehicles equipped with turbochargers or superchargers.
Turbo/Supercharger Bypass Valve Control Circuit Range/Performance
Code symptoms P0039.
1. Decreased engine performance.
2. Reduced fuel efficiency.
3. Illuminated “Check Engine” or “Service Engine Soon” light on the dashboard.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0039.
1. Malfunctioning turbocharger or supercharger bypass valve.
2. Wiring or connector issues within the control circuit.
3. Problems with the Engine Control Module (ECM).
Code Solutions P0039.
1. Inspect and replace the turbocharger or supercharger bypass valve if it’s malfunctioning.
2. Check and repair any damaged wiring or connectors in the control circuit.
3. If ECM issues are suspected, consult a qualified technician for diagnosis and potential reprogramming or replacement.