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2000 BMW X5 4.4I E53
4.4L V8 M62•AWD•AUTOMATIC•gas•M62B44
6 active safety recalls on this vehicle — view recalls
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Repairs0Labor489Torque2160Fluid10DTC1997Battery1Maintenance0Recalls6
P0519moderate severityPowertrain

Idle Air Control Circuit Performance

on 2000 BMW X5 4.4i E53 4.4L V8 M62 · AWD

What this code means

The PCM sees that actual idle speed does not match the commanded idle from the IAC system. This means the idle control is not performing within expected limits.

Symptoms

  • High or low idle speed
  • Rough idle
  • Stalling at stops

Common causes

  • Dirty or sticking IAC valve
  • Vacuum leak affecting idle
  • Faulty IAC motor
  • Carbon buildup in throttle body

Diagnostic steps

  1. Scan and record freeze frame data
  2. Compare commanded vs actual idle speed
  3. Inspect throttle body and IAC for carbon
  4. Check for intake vacuum leaks
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