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Home >> Subaru >> 2019 >> WRX STI Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Continuously Variable Transmission (Diagnostics)) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P0721: Output Shaft Speed Sensor Circuit Range/Performance >> Notes

DTC P0721: Output Shaft Speed Sensor Circuit Range/Performance: Notes

WARNING: This page is about a different variant/trim than selected.

DTC detecting condition: 

Immediately at fault recognition

Trouble symptom: 

  1. CHECK DTC. 

    Read the DTC using Subaru Select Monitor.

    Besides DTC P0721, is DTC P1706 or P0500 displayed?

    Yes:  Perform the diagnosis according to DTCs other than P0721.

    No:  Perform the diagnosis according to DTC P0720. Refer to CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC P0720 OUTPUT SHAFT SPEED SENSOR CIRCUIT .