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P0506: Idle Air Control System RPM Lower Than Expected
The idle speed is below target and the computer cannot correct it enough.
Common causes
- Dirty throttle body
- Vacuum leak
- Idle air control fault
- Low charging voltage
This free page explains the code. A Shop Brief adapts the next steps to your year, make, model, and full code stack.
Related codes:
P0171P0113P0300 Pricing Sample brief