Code Definition

P1492 — EVAP Purge Control Solenoid Valve

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

About P1492

P1492 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.

P1492 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 P1492 relates to the EVAP canister purge control solenoid valve circuit on these Nissan and Infiniti vehicles. This solenoid is a vacuum switching valve that the Engine Control Module (ECM) operates to apply intake manifold vacuum to the purge control valve built into the charcoal canister, working alongside the canister control vacuum check switch. The code is set when the ECM detects an improper voltage in the purge control solenoid valve circuit, pointing to an open circuit, a short or a failed solenoid winding rather than a vacuum or flow fault. With the solenoid circuit faulty, the pu...

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