P0506Severity: Low
P0506 – Idle Speed Lower Than Expected
Engine idle speed is below the target.
What it means
The idle control system can't keep the RPM high enough; the engine idles low or may stall. Usually a dirty throttle or an air leak.
Symptoms
- Low/fluctuating idle
- Tendency to stall
- Check-engine light
Common causes
- Dirty throttle body
- Idle control valve issue
- Vacuum leak
- Wiring/connector issue
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Frequently asked questions
What does trouble code P0506 mean?
P0506 – Idle Speed Lower Than Expected. The idle control system can't keep the RPM high enough; the engine idles low or may stall. Usually a dirty throttle or an air leak.
Can I drive with a P0506 code?
It's usually not urgent, but finding and fixing the cause matters for emissions and fuel economy.