P123E - Nitrogen Oxide Sensor Sensor Poisoning NOx Signal Too Low

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

P123E Possible Causes

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

How do I fix code P123E?

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 P123E code

Labor: 1.0

The cost of diagnosing the P123E code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

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

P123E 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 P123e - Nitrogen Oxide Sensor Sensor Poisoning NOx Signal Too Low - AutoCodes.com

More Information

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Information for specific makes

  • P123E BMW Nitrogen Oxide Sensor Sensor Poisoning NOx Signal Too Low
  • P123E MINI Nitrogen Oxide Sensor Sensor Poisoning NOx Signal Too Low

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