Sa-16-dtc-p004607 Apr 2026

: 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.

: A sub-fault identifier indicating a mechanical failure (specifically that the actuator is unable to move the VGT vanes). Key Informative Features & Symptoms sa-16-dtc-p004607

Experts often recommend replacing the rather than just the actuator for this specific code, as putting a new actuator on a worn or soot-heavy turbo frequently leads to the same failure within a few months. : Use a diagnostic tool like Volvo Premium

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

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

: 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 primary fault code for Turbocharger Boost Control Circuit Range/Performance .