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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
P0851moderate severityPowertrain

Park/Neutral Switch Input Circuit Low

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

What this code means

The PCM sees a low voltage input from the park/neutral position switch. This may affect starting and gear-related engine functions.

Symptoms

  • No-start in Park or Neutral
  • Incorrect gear display
  • Backup lights inoperative

Common causes

  • Faulty park/neutral switch
  • Short to ground in circuit
  • Loose or corroded connector
  • Failed transmission range sensor

Diagnostic steps

  1. Retrieve codes and check freeze frame
  2. Inspect PNP switch wiring for shorts
  3. Test switch continuity across gear positions
  4. Replace faulty switch or sensor
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