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P2221 CHEVROLET

P2221 CHEVROLET - NOx Sensor Heater Sense Circuit Bank 2

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)

P2221 Chevrolet Description

The Nitrogen Oxide (NOx) sensor measures the amount of nitric oxide and nitrogen oxide in the exhaust system. When the NOx sensor indicates that the storage capacity has been reached, the regeneration phase is initiated by the fueling management system. The Powertrain Control Module (PCM) monitors the NOx sensor and sets the code when the NOx sensor circuit voltage reading is not within the normal operating threshold for a specific engine bank.
OBDII Code P2221 Chevrolet - NOx Sensor Heater Sense Circuit Bank 2 - AutoCodes.com

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P2221 CHEVROLET Comments

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