Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
The cost to diagnose the P1492 Nissan code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
The system control the vacuum signal applied to the EVAP canister purge control valve.
When the Engine Control Module (ECM) detects any of the following conditions, current does not flow through the EVAP canister purge control solenoid valve.
The Solenoid valve cuts the vacuum signal so that the EVAP canister purge control valve remains closed.
Conditions:
- Start switch ON
- Closed throttle position
- Low or high engine coolant temperature
- During deceleration
- Engine stopped
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