Idle Control System Malfunction
Table of contents
P0519 SUBARU Possible Causes
- Vacuum leak
- Faulty Idle Air Control Valve
- Idle Air Control Valve harness is open or shorted
- Idle Air Control Valve circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How do I fix code P0519 SUBARU?
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’s pins.
Tech Notes
- Clean Idle Air Control Valve (IACV)
- – Warm up Engine
- – Remove the intercooler and set aside
- – Disconnect the Mass Airflow sensor connector
- – Cycle the key “On/Off” once
- – Start the car and maintain engine speed between 1000-1500rpm
- – Spray engine cleaner on the upper air-stream of the throttle chamber for approximately 10 seconds
- – Step engine and let sit for 3 minutes
- – Restart engine and maintain 1000 to 1500 rpms
- – Spray Engine cleaner on the upper air-stream of the throttle chamber for approximately 10 seconds
- – Turn engine off
- – Reinstall intercooler and reconnect Mas Airflow sensor connector
- – Operate car between 1000-2000rpms until no white smoke appears through tailpipe
- – Turn ignition switch off and clear memory
Cost of diagnosing the P0519 SUBARU code
The cost of diagnosing the P0519 SUBARU code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0519 SUBARU Description
Many factors are considered when controlling the engine idle speed. Ambient conditions and electric loads are two such considerations. The idle speed can be adjusted by varying the ignition timing, idle speed control valve, throttle valve position, injection timing and quantity, etc.
For vehicles which use an idle speed control valve, there are two common types:
– Air by-pass system, allows additional air to enter the intake manifold by-passing the throttle valve. This works for speed density systems that use a manifold absolute p[pressure sensor to detect load.
– Stepper motor, adjust throttle valve position.