Code Definition

P0445 — Evaporative Emission Control System Purge Control Valve Circuit Shorted

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

About P0445

P0445 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.

When P0445 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

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 P0445 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 engine control module (ECM) sets this code when it detects a short circuit in the purge control valve circuit. The purge valve regulates the flow of fuel vapours from the EVAP canister to the intake manifold. A short to ground or power in the circuit can cause improper valve operation, leading to excessive or uncontrolled vapour flow.

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