Code Definition

P0497 — Evaporative emission system Purge flow low

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

About P0497

P0497 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 P0497 is stored, the module has detected a signal or supply voltage lower than the expected operating range.

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 P0497 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 Powertrain Control Module (PCM) sets this code when it detects insufficient purge flow in the evapourative emissions (EVAP) system. This typically indicates a restriction in the purge line, a malfunctioning purge valve, or a circuit issue preventing proper vapour flow from the charcoal canister to the intake manifold.

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