What does code P1519 mean?

Q: What does code P1519 mean?

IAC Valve Circuit Failure. P1519 on Nissan vehicles indicates that the engine control module (ECM) has detected a fault in the idle air control (IAC) valve circuit, meaning the electrical path to the valve is open, shorted, or the valve itself has failed. The ECM monitors the circuit and sets this code when the commanded idle speed cannot be achieved or the circuit feedback does not match expected values.

DTC codes / Nissan codes / P1519

P1519 · NissanIAC Valve Circuit Failure

P1519 on Nissan vehicles indicates that the engine control module (ECM) has detected a fault in the idle air control (IAC) valve circuit, meaning the electrical path to the valve is open, shorted, or the valve itself has failed. The ECM monitors the circuit and sets this code when the commanded idle speed cannot be achieved or the circuit feedback does not match expected values.

SystemPowertrain

Code typeNissan specific

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

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