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2017 JEEP COMPASS
2.0L I4 Turbo•AWD•AUTOMATIC•gas•turbo
4 active safety recalls on this vehicle — view recalls
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Repairs0Labor997Torque6841Fluid17DTC2340Battery2Maintenance0Recalls4
P0505moderate severityPowertrain

Idle Air Control System

on 2017 Jeep Compass 2.0L I4 Turbo · AWD

What this code means

Malfunction in the idle air control (IAC) system.

Symptoms

  • Erratic idle speed
  • High idle
  • Low idle
  • Stalling at idle
  • Fluctuating RPM

Common causes

  • Faulty IAC valve
  • Carbon buildup in IAC or throttle body
  • Vacuum leak
  • PCM issue

Diagnostic steps

  1. Clean IAC valve and passages
  2. Clean throttle body
  3. Test IAC valve operation
  4. Check for vacuum leaks
  5. Monitor idle RPM with scan tool

Repair notes

Clean IAC valve and throttle body first. Replace IAC if cleaning fails.

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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