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2004 DODGE CARAVAN
3.3L V6•FWD•AUTOMATIC•gas
8 active safety recalls on this vehicle — view recalls
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Repairs0Labor481Torque3314Fluid7DTC1736Battery1Maintenance0Recalls8
P0518moderate severityPowertrain

Idle Air Control Circuit Intermittent

on 2004 Dodge Caravan 3.3L V6 · FWD

What this code means

The PCM has detected an intermittent fault in the idle air control (IAC) circuit. This can cause unstable idle behavior when the connection drops out momentarily.

Symptoms

  • Erratic or fluctuating idle
  • Occasional stalling
  • Check engine light on

Common causes

  • Loose or corroded IAC connector
  • Damaged IAC wiring
  • Faulty idle air control valve
  • Poor PCM ground

Diagnostic steps

  1. Scan for stored and pending codes
  2. Inspect IAC connector and wiring for looseness
  3. Wiggle-test harness while monitoring live data
  4. Test IAC valve resistance and operation
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Other Powertrain codes on this vehicle

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