What does code P1519 mean?

Q: What does code P1519 mean?

IAC Valve Circuit Failure. P1519 on Honda vehicles indicates that the powertrain control module (PCM) has detected an electrical fault in the idle air control (IAC) valve circuit, such as an open, short, or excessive current draw. The PCM monitors the IAC valve's command wire and expects a specific current or voltage response; when the signal falls outside the expected range, the code is stored and the check engine light is illuminated.

DTC codes / Honda codes / P1519

P1519 · HondaIAC Valve Circuit Failure

P1519 on Honda vehicles indicates that the powertrain control module (PCM) has detected an electrical fault in the idle air control (IAC) valve circuit, such as an open, short, or excessive current draw. The PCM monitors the IAC valve's command wire and expects a specific current or voltage response; when the signal falls outside the expected range, the code is stored and the check engine light is illuminated.

SystemPowertrain

Code typeHonda specific

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

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