P0246 means the powertrain control module has detected a higher-than-expected voltage or resistance condition in the turbocharger/supercharger wastegate actuator control circuit. This is an electrical fault, indicating the circuit is staying near system voltage instead of being properly pulsed or grounded.
The solenoid coil or actuator driver can fail internally, causing a short-to-power condition that keeps the circuit voltage high.
The control wire may chafe against a power feed near hot exhaust components, routing unintended voltage into the wastegate actuator circuit.
Corroded, pushed-out, or shorted pins in the actuator or PCM connector can alter circuit resistance and create a high-voltage signal.
The output transistor inside the PCM could be stuck high, but this is an uncommon cause and should only be considered after wiring and actuator faults are ruled out.
It is not advisable. Incorrect wastegate control can produce overboost, engine knock, or protective limp mode that reduces reliability.
Usually not. This code points to an electrical control-circuit fault for the wastegate actuator or solenoid, not a mechanical failure of the turbocharger itself.
No. PCM failure is a rare cause of this code; most cases are resolved by repairing damaged wiring or replacing the wastegate control solenoid or actuator.
Clearing the code may temporarily turn off the light, but P0246 will typically return until the underlying electrical fault is repaired.