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Home >> Subaru >> 2019 >> BRZ Series.Gray >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (3 Of 3) >> EFI System (FA20) >> DTC P2270: O2 Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 2) >> Description of functions >> Test drive
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Test drive

Perform test drive to check if the DTC recurs.

G12586144Courtesy of SUBARU OF AMERICA, INC.
  1. Connect the SSM4 to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn on the SSM4.
  4. Follow the SSM4 on-screen instructions to clear the DTCs. (Refer to CHECKING/CLEARING DTC )
  5. Turn the ignition switch to OFF, and wait for 30 seconds.
  6. Turn the ignition switch to ON.
  7. Turn on the SSM4.
  8. Start the engine and let it warm up until the engine coolant temperature stabilizes. (at 75°C {167°F} or more).
  9. Perform driving test as follows.
    WARNING: When performing this driving test, always observe the applicable traffic laws such as the speed limit.
    1. Drive at 80 km/h {49.7 MPH} or more for 20 minutes or more. (A)
    2. Stop the vehicle.
    3. Idle the engine for 1 minute or more. (B)
  10. Follow the SSM4 on-screen instructions to check the DTC. (Refer to CHECKING/CLEARING DTC )