Code Definition

P1493 — EVAP Purge Control Valve and Solenoid Valve

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

About P1493

P1493 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.

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.

P1493 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 P1493 relates to the EVAP canister purge control valve and its purge control solenoid valve as a unit on these Nissan and Infiniti vehicles. The purge control solenoid valve switches intake manifold vacuum to the purge control valve built into the charcoal canister, and that valve then opens to let stored vapour purge into the engine. This code is set when the Engine Control Module (ECM) determines the purge control valve and solenoid are not operating correctly together, for example the purge control valve not opening when the solenoid is commanded, often judged through the canister contr...

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