P0507moderate severityPowertrain
Idle Air Control System RPM Higher Than Expected
on 2010 Audi Q7 3.0L TDI V6 · AWD
What this code means
The idle speed is consistently above the target RPM.
Symptoms
- High idle speed
- Engine racing at idle
Common causes
- Vacuum leak (most common)
- IAC valve stuck open
- Throttle plate not closing fully
- Intake gasket leak
Diagnostic steps
- Check for vacuum leaks
- Inspect throttle plate
- Test IAC valve
- Check intake gaskets
Repair notes
Find and fix vacuum leak. Clean throttle body. Replace IAC if stuck open.
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