What does code P0507 mean on a Subaru and is it safe to drive?
P0507: Idle Air Control System RPM Higher Than Expected. Here's what it means on your Subaru, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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What this code means
Idle speed is higher than the PCM expects. Often caused by a vacuum leak or dirty IAC valve.
Common causes for your Subaru
- Vacuum leak
- Dirty or faulty idle air control valve
- Throttle body carbon buildup
Symptoms
- High idle
- Check Engine Light
- Possible surging
Typical fixes
- Find and fix vacuum leaks
- Clean or replace IAC valve
- Clean throttle body
Repair cost range
For a Subaru, repairs for P0507 often fall between $50 and $400, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Subaru
Subaru P0507 on EJ25 engines is most often a dirty IACV or a failed throttle position sensor. After cleaning the throttle body, the idle relearn procedure (10 ignition cycles with specific timing) is required—skipping it will leave the idle high even after a clean part is installed.
Most commonly affected models
Outback 2006–2012Legacy 2006–2012Forester 2006–2011