What does code P1459 mean?

Q: What does code P1459 mean?

EVAP Purge Flow Switch Malfunction. P1459 on Nissan vehicles means the engine computer detected a malfunction in the evaporative emission (EVAP) purge flow switch circuit, which monitors whether fuel vapor is actually being drawn from the charcoal canister into the intake. The computer expects a specific voltage change on the purge flow switch signal when the purge valve is commanded open, and it sets this code when that change does not occur within the calibrated test window.

DTC codes / Nissan codes / P1459

P1459 · NissanEVAP Purge Flow Switch Malfunction

P1459 on Nissan vehicles means the engine computer detected a malfunction in the evaporative emission (EVAP) purge flow switch circuit, which monitors whether fuel vapor is actually being drawn from the charcoal canister into the intake. The computer expects a specific voltage change on the purge flow switch signal when the purge valve is commanded open, and it sets this code when that change does not occur within the calibrated test window.

SystemPowertrain

Code typeNissan specific

SeverityLow

Fix difficultyIntermediate

AreaAuxiliary emission controls

Guidance is general and written for Nissan vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.