P0519 – Idle air control (IAC) -circuit performance

By BAT Team (Contact Me)
Last Updated 2015-11-18
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Trouble CodeFault LocationProbable Cause
P0519 Idle air control (IAC) -circuit performance Wiring, poor connection, lac valve, ECM

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BAT Team Discussions for P0519

  • PO519 Idle Air Control
    My friend's 2004 Subaru Forester with 4 cyl non turbo and 21K miles (yes, only 21,000 miles) has had a intermittent P0519 for about 9 months. It has passed smog when this is off recently. There are no driveabilty problems at all. Black tape over the light would solve everything. What should we l...