CC
CarCodeFix
P0505Medium Priority

Idle Control System Malfunction

Category: Powertrain• Vehicle Speed, Idle Control, Auxiliary Inputs

22 articles · 5 makes affected

What is P0505?

Idle Air Control System Malfunction. Problem with the idle air control (IAC) valve or system, affecting idle speed regulation.

Symptoms You May Notice

  • ●Check engine light
  • ●Erratic idle
  • ●Engine stalling
  • ●High idle speed
  • ●Low idle speed

How to Fix It

  • ●Clean IAC valve ($80-$200, beginner)
  • ●Replace IAC valve ($150-$400, intermediate)
  • ●Clean throttle body ($80-$200, beginner)
  • ●Check for vacuum leaks ($50-$200, intermediate)

Owner Statistics

Based on 83,584 real owner discussions • 3109 confirmed solutions

Dataset (83,584 records)
$1,741
Average Repair Cost
4%
Success Rate
18%
DIY Repairs
83,584
Data Sources

About This Data

Statistics are aggregated from real owner discussions on Reddit, automotive forums, and YouTube comments. All data is anonymized and represents actual repair experiences reported by vehicle owners.

Frequently Appears With

These codes often appear together in owner reports. Check these if you see P0505.

Based on analysis of 18 owner reports where multiple codes appeared together.

Issues by Vehicle