For Shop Owners

P0161 - HO2S Heater Performance Bank 2 Sensor 2

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3 What does this mean?

Possible causes

  • Faulty Rear Heated Oxygen Sensor Bank 2
  • Rear Heated Oxygen Sensor Bank 2 harness is open or shorted
  • Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks
  • Exhaust gas leaks
What does this mean?

Tech notes

Replacing the Rear Heated Oxygen Sensor Bank 2 usually takes care of the problem
What does this mean?