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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
P2223moderate severityPowertrain

NOx Sensor Circuit Low (Bank 1)

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

What this code means

The NOx sensor signal on bank 1 is reading below its expected range. This points to a sensor or circuit fault affecting emissions readings.

Symptoms

  • Check engine light on
  • Increased NOx emissions
  • Failed emissions test

Common causes

  • Faulty NOx sensor
  • Short to ground in signal wiring
  • Corroded sensor connector
  • PCM signal circuit fault

Diagnostic steps

  1. Scan and record NOx sensor data
  2. Check sensor signal voltage
  3. Inspect wiring for shorts to ground
  4. Replace NOx sensor if circuit is good
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