Sa-16-dtc-p004607 -

: A sub-fault identifier indicating a mechanical failure (specifically that the actuator is unable to move the VGT vanes). Key Informative Features & Symptoms

: The engine will likely lose significant power as the ECU limits torque to protect the engine.

The code is a specific diagnostic fault typically found in Volvo and Mack trucks (specifically those with D11, D13, or MP8 engines) indicating a Variable Geometry Turbocharger (VGT) mechanical fault . Code Breakdown sa-16-dtc-p004607

: In some cases, this code is triggered because coolant or water has leaked into the electrical side of the turbo actuator, often signaled by a blown fuse (FE8 or FE9). Recommended Troubleshooting Steps

: The truck may be unable to initiate a parked Diesel Particulate Filter (DPF) regeneration, or it may enter a continuous, never-ending regen cycle. : A sub-fault identifier indicating a mechanical failure

: The actuator is physically blocked from moving the turbo vanes, often due to heavy soot accumulation or internal mechanical binding.

: Use a diagnostic tool like Volvo Premium Tech Tool to run a "VGT Function Test." This will attempt to move the actuator through its full range of motion to see if it binds. Code Breakdown : In some cases, this code

: Inspect the dedicated engine compartment fuses (commonly FE8 or FE9 ) to see if the actuator has shorted out.