Code Definition

P1447 — EVAP Purge Flow Monitor

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Infiniti

About P1447

P1447 is a manufacturer-specific powertrain diagnostic trouble code recorded for Infiniti vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1447 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.

P1447 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

DTC P1447 relates to the evaporative emission purge flow monitoring function on these Nissan and Infiniti vehicles. The Engine Control Module (ECM) periodically checks that fuel vapour is actually flowing from the charcoal canister into the engine when purge is commanded, typically by closing the vent valve and watching for a vacuum to develop in the sealed EVAP system at the fuel tank pressure sensor. P1447 is set when this monitor cannot detect the expected purge flow, indicating the purge path is blocked or a valve is not operating. Likely points of failure are the purge volume control valv...

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