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

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

P123D 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

How do I fix code P123D

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P123D code

    Labor: 1.0

    The cost of diagnosing the P123D code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

P123D Possible Symptoms

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

P123D Meaning

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 - Nitrogen Oxide Sensor Sensor Poisoning Binary Lambda Signal Too Rich - Engine-Codes.com

P123D More Information

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P123D Information for specific makes

  • P123D BMW Nitrogen Oxide Sensor Sensor Poisoning Binary Lambda Signal Too Rich
  • P123D MINI Nitrogen Oxide Sensor Sensor Poisoning Binary Lambda Signal Too Rich

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