Engine-Codes - Generic - P0519

P0519 Code - Idle Air Control System Performance

- Code Popularity: 11,434 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
Table of contents
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What are the Possible Causes of the DTC P0519?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other 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)
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How to Fix the DTC P0519?

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.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P0519 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.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P0519 Code Mean?

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.

P0519 Code - Idle Air Control System Performance

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Code P0519 Information for Specific Makes

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