What Does P0519 Code Mean?

OBD-II Code P0519 is defined as a Idle Air Control System Performance

The Idle Control System manages the engine idle speed. To raise or lower the engine Idle speed, the engine control module (PCM), opens or closes the Idle Air Control valve to allow more or less air into the engine. When the PCM cannot achieve the desired RPM, it will set code P0519.

P0519 Symptoms

  • Engine idle speed is higher than normal
  • Engine stalls when coming to a stop

Common Problems That Trigger the P0519 Code

  • Clogged air filter
  • Idle Air Control (IAC) valve failure
  • Powertrain Control Module (PCM) failure
  • Vacuum leak
  • Wiring issue
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