Code Definition

P00AF — Turbo/Super Charger Boost Control Module Malfunction - Module A

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P00AF

P00AF is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P00AF is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P00AF fault code is set when the Engine Control Module (ECM) detects a performance issue with the 'A' module of the turbocharger or supercharger boost control system. This system is responsible for regulating the amount of boost (pressurised air) supplied to the engine by the turbocharger or supercharger. The boost control module plays a critical role in this process by controlling various components like wastegates, bypass valves, or variable geometry/vane mechanisms, based on the ECM's commands. A malfunction in the boost control module can lead to issues with controlling the boost press...

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