P123D BMW - Nitrogen Oxide Sensor Sensor Poisoning Binary Lambda Signal Too Rich

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Nitrogen Oxide (NOx) Sensor Signal Linear Oxygen Sensor
  • Nitrogen Oxide (NOx) Sensor Signal Linear Oxygen Sensor harness is open or shorted
  • Nitrogen Oxide (NOx) Sensor Signal Linear Oxygen Sensor circuit poor electrical connection

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P123d Bmw Description

The Engine Control Module (ECM) monitors the Nitrogen Oxide Sensor. The ECM sets the OBDII code when the Nitrogen Oxide Sensor is not to factory specifications.
OBDII Code P123d Bmw - Nitrogen Oxide Sensor Sensor Poisoning Binary Lambda Signal Too Rich - AutoCodes.com

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