TSB: Updated Subaru O2 Sensors

This bulletin details the introduction of new oxygen sensors for Subaru models from 2017 to 2024, designed to resolve specific DTCs related to sensor circuit issues, with improved internal coatings to prevent cracking and circuit failures.
Related To: 
June 30, 2026
Add Us On Google
Mitchell 1
Example of the Denso part number location.

Example of the Denso part number location.

Updated Subaru O2 Sensors

This bulletin applies to 2020-2024 Subaru Legacy and Outback 2.5L, 2017-2024 Impreza and Crosstrek, 2019-2023 Forester and 2022-2023 BRZ vehicles. New oxygen sensors have been developed to address the following DTCs:

  • P0137 (O2 sensor circuit low voltage Bank 1 Sensor 2)
  • P0138 (O2 sensor circuit high voltage Bank 1 Sensor 2)
  • P0140 (O2 sensor circuit no activity detected Bank 1 Sensor 2)
  • P0141 (O2 sensor heater circuit Bank 1 Sensor 2)

The new sensors have an optimized coating to help prevent cracking within the internal surfaces, reducing any possibility of short/open circuits.  The Subaru part numbers remain unchanged, but the sensors can be identified old vs new by the new Denso part numbers.

 

Subaru P/N New Denso P/N Old Denso P/N
22690AB070 150200-9002 150200-9001
22690AB08A 150200-9011 150200-9010
22690AB130 150200-9032 150200-9031
Sign up for our eNewsletters
Get the latest news and updates

Related

Mining Gold in the Data
TSB: Jeep 4WD Glitch
A Guide to the Perfect ADAS Calibration Setup
Sponsored
Discover the right Autel ADAS System for Your Shop and Business Model
Sponsored

Voice Your Opinion!

To join the conversation, and become an exclusive member of Vehicle Service Pros, create an account today!