OBD-II Code · Powertrain
P0506
Idle Air Control — RPM Lower Than Expected
medium severitySafe to drive$50-$400
Idle speed lower than commanded.
Common symptoms
- Stalling at idle
- Hard restart after stall
- CEL
Likely causes
- Dirty throttle body
- Failing IAC
- Vacuum + load issues (AC clutch stuck on)
Where to start
- Try the cheapest cause first. Start by checking: dirty throttle body.
- Cost & scope. $50-$400
- If the code returns after the fix: escalate to a shop or scanner with live-data and freeze-frame. A code that re-sets means the underlying fault is still there.
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