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Home >> Subaru >> 2021 >> WRX Limited, Automatic CVT Trans >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Continuously Variable Transmission (Diagnostics) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0841: Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance >> Classification Of Symptom Using Freeze Frame Data
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Classification Of Symptom Using Freeze Frame Data

Apply the values of «Actual Secondary Pressure» and «Secondary Actual Current» recorded in the freeze frame data onto the graph shown in the following figure, and judge if either low-voltage malfunction or high-voltage malfunction occurs.

G13650790Courtesy of SUBARU OF AMERICA, INC.
NOTE: Symptom that the DTC P0841 illuminates can be classified into 2 patterns.
  • Low-voltage malfunction: detected due to insufficient oil pressure
  • High-voltage malfunction: detected due to excessive oil pressure