Free API
P1220moderate severityPowertrain

Idle Speed Control Servo Malfunction

on 2014 Mitsubishi Outlander 2.4L I4 · FWD

What this code means

The idle speed control servo that regulates engine idle RPM is not working correctly. This is a Mitsubishi-specific code with no direct generic OBD equivalent.

Symptoms

  • Rough or unstable idle
  • Stalling at stops
  • Fluctuating idle RPM

Common causes

  • Faulty ISC servo motor
  • Dirty throttle body
  • Wiring or connector fault
  • Failed PCM driver circuit

Diagnostic steps

  1. Scan for stored codes
  2. Inspect ISC servo wiring and connectors
  3. Test ISC servo resistance and operation
  4. Clean throttle body and recheck idle

Other Powertrain codes on this vehicle

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