P0161 Atención pronto

O2 Sensor Heater Circuit

Powertrain

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Descripción

This code indicates a problem with the heating element inside the oxygen sensor on Bank 2, Sensor 2. This heater helps the sensor warm up quickly to start working accurately, so a fault here affects its performance.

Causas comunes

  • Faulty oxygen sensor (Bank 2, Sensor 2) with failed heater
  • Wiring issue to the oxygen sensor heater
  • Blown fuse for the oxygen sensor heater circuit
  • Problem with the engine computer

Síntomas

  • Check Engine Light is on
  • Reduced fuel economy
  • Increased emissions
  • Engine may run rich

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