P126F - Nitrogen Oxide Sensor Trailing Throttle Check Linear 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
  • Nitrogen Oxide (NOx) Sensor harness is open or shorted
  • Nitrogen Oxide (NOx) Sensor circuit poor electrical connection

Possible symptoms

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

P126f 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 P126f - Nitrogen Oxide Sensor Trailing Throttle Check Linear Lambda Signal Too Rich - AutoCodes.com

P126F Information for specific makes

  • P126F BMW Nitrogen Oxide Sensor Trailing Throttle Check Linear Lambda Signal Too Rich
  • P126F FORD Fuel Injector 6 Input Circuit Malfunction
  • P126F MINI Nitrogen Oxide Sensor Trailing Throttle Check Linear Lambda Signal Too Rich

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P126F Comments

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