P0505
P0505 — Idle Air Control System
1
Driver reports
1
Solved cases
1
Verified fixes
0
Wrong repairs reported
📊 Diagnostic Overview
Severity, cost and difficulty for P0505, based on data already on this page.
Severity
🟡 Medium
Diagnostic Difficulty
Not enough data yet
System
Engine
Common Causes (based on confirmed repairs)
- P0505 = IAC valve not controlling idle properly. IAC valve meters air bypass around throttle to maintain idle. Symptoms: high idle (2000+ RPM), low idle causing stalls, erratic idle hunting up and down. Fix: 1) Clean throttle body and IAC valve with throt 1 vehicle
📐 Diagnostic Difficulty reflects how many different repairs drivers have tried for P0505 and how often those attempts turned out to be the wrong fix — it is calculated from MyCarFault's own reports, not an official manufacturer rating.
⭐ MOST VERIFIED FIX FOR P0505
P0505 = IAC valve not controlling idle properly. IAC valve meters air bypass around throttle to maintain idle. Symptoms: high idle (2000+ RPM), low idle causing stalls, erratic idle hunting up and down. Fix: 1) Clean throttle body and IAC valve with throt
Reported in 1 approved case
·
⚪ Unverified
Top Reported Fixes for P0505
Ranked by confidence score — same vehicle matches weighted higher.
Driver Reports — P0505 1 report
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