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Home >> Subaru >> 2019 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (2 Of 3) >> EFI System (FA20) >> DTC P0300: Random/Multiple Cylinder Misfire Detected; DTC P0301: Cylinder 1 Misfire Detected; DTC P0302: Cylinder 2 Misfire Detected; DTC P0303: Cylinder 3 Misfire Detected; DTC P0304: Cylinder 4 Misfire Detected >> Description of functions >> Test drive A

Test drive A

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 )
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