This code indicates the powertrain control module has detected an electrical malfunction in the circuit controlling the turbocharger or supercharger bypass valve (also called a recirculation or blow-off valve). The valve regulates boost pressure by diverting excess airflow, and the fault may involve an open circuit, short to ground or power, or an abnormal voltage reading.
The electromagnetic coil or motor actuator that physically moves the valve has failed internally, preventing proper electrical operation and causing circuit voltage readings outside expected parameters.
Open circuits, shorts to ground or voltage, or high resistance in the wiring between the PCM and valve connector due to chafing, heat damage, rodent chewing, or moisture intrusion.
Corroded, bent, backed-out, or loose pins in the valve connector or related harness connectors causing intermittent or permanent circuit failure.
For vacuum-actuated bypass valves, cracked hoses, loose fittings, or blockages prevent proper valve operation and may trigger circuit monitoring faults in integrated solenoid systems.
Internal driver circuit failure within the powertrain control module is uncommon for this specific code; this should only be considered after all wiring and component testing confirms integrity.
Short trips are generally possible, but prolonged driving may cause turbocharger stress or catalytic converter damage due to improper boost regulation; repair should be scheduled promptly.
No, the code specifically indicates an electrical control circuit issue with the bypass valve rather than mechanical failure of the turbocharger itself.
PCM failure causing this code is rare; insist on testing the wiring harness and valve solenoid first, as these components are far more commonly at fault.
A bypass valve (blow-off valve) typically recirculates or vents excess compressed air from the intake tract, while a wastegate diverts exhaust gases to control turbine speed; both regulate boost but operate in different parts of the system.