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Old 02-15-2011, 09:18 AM   #3
medamullet
Scooby Guru
 
Member#: 99442
Join Date: Oct 2005
Chapter/Region: International
Location: Man of Mystery
Vehicle:
2006 SGM STI
I'm on CORN YO!

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I found this, i guess it's as good as any place to start trouble shooting

Quote:
DTC P0519 - IDLE CONTROL SYSTEM MALFUNCTION (FAIL-SAFE)

DTC DETECTING CONDITION:
Immediately at fault recognition

TROUBLE SYMPTOM:
Engine keeps running at higher revolution than specified idling revolution.

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Here are the steps if you want to do the step-by-step inspection yourself before taking it in. If you recently changed your air filter, check your air box and see if it is seated correctly. It can be that easy or adjustment of throttle cable, loose or cracked vacuum lines, cracked gaskets or worst - idle air control solenoid.

1. Check for loose installation of intake manifold - particularly the unit that house the air filter

2. Check for cracks on intake manifold

3. Check for cracks on gasket of throttle body

4. Check for cracks on gasket of idle air control solenoid valve

5. Any vacuum hose disconnected or leaking?

6. Check throttle body cable for excessive play

7. Check the bypass air line for foreign particles that can clogged the system
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