Engine-Codes - Generic - P126A

P126A - Nitrogen Oxide Sensor Oxygen Sensor Before Catalytic Converter Plausibility Correlation Fault

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

P126A Possible Causes

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

How is the P126A code repair?

Start by checking 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.

What is the cost to diagnose the P126A code

Labor: 1.0

The cost to diagnose the P126A 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.

Possible Symptoms

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

P126A Meaning

The Engine Control Module (ECM) monitors the Nitrogen Oxide (NOx) Sensor. The ECM sets the OBDII code when the Nitrogen Oxide (NOx) Sensor is not to factory specifications.

More Information

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Information for specific makes

  • P126A BMW Nitrogen Oxide Sensor Oxygen Sensor Before Catalytic Converter Plausibility Correlation Fault
  • P126A GEO Fuel Injector 1 Input Circuit Malfunction
  • P126A MINI Nitrogen Oxide Sensor Oxygen Sensor Before Catalytic Converter Plausibility Correlation Fault

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