How to test and replace a rear oxygen sensor on a late model Subaru. This happens to be a 2011 Subaru Outback with the popular Subaru 2.5L Boxer engine.
Trouble codes associated with the rear oxygen sensor (Bank 1 Sensor 2):
P0037 - HO2S Heater Control Circuit Low
P0038 - HO2S Heater Control Circuit High
P0137 - O2 Sensor Circuit Low Voltage
P0138 - O2 Sensor Circuit High Voltage
P0139 - O2 Sensor Circuit Slow Response
P0140 - O2 Sensor Circuit No Activity Detected
P0141 - O2 Sensor Heater Circuit
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Note:
Any attempt to repair automotive parts and/or systems carries risk of personal injury. Always adhere and follow safe practices when working on vehicles. Such as, safety glasses, jack stands, no loose clothing, etc. No guarantee or warranty is implied. Use the information in this video at your own risk. Carsntoys is a member of the Amazon Influencer Program.
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