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

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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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

First diagnose P126A code

    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 terminals.

Cost of diagnosing the P126A code

    Labor: 1.0

    The cost of diagnosing the P126A 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.

P126A Possible Symptoms

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

P126a Description

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.
OBDII Code P126a - Nitrogen Oxide Sensor Oxygen Sensor Before Catalytic Converter Plausibility Correlation Fault - AutoCodes.com

P126A More Information

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P126A 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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