Electrical
Code P0505
Idle Air Control System Malfunction
Plain English Meaning:Idle speed not properly controlled
⚠️
Yellow: Drive with Caution
Can stall
P0505 Symptoms
- •High or low idle stalling
Most Common Causes of P0505
1Dirty throttle body faulty IAC valve
P0505 Repair Playbook
Required Mechanic Tests
A qualified shop should perform these tests before replacing any parts to ensure they aren't guessing:
Inspect throttle body clean IAC
Typical Fix Paths & Estimated Costs
Repair idle system $100–$400
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