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Home >> Subaru >> 2020 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle (Diagnostics) >> Automatic Transmission System >> DTC P0721: Output Shaft Speed Sensor Circuit Range/Performance >> Monitor description >> Notes

Monitor description: Notes

Compare the vehicle speed determined from the transmission revolution sensor (SP2) and the VDC wheel speed to check if an abnormal signal is emitted from the transmission revolution sensor (SP2).

If a ratio of the vehicle speed determined from the transmission revolution sensor (SP2) to VDC wheel speed is more than 15 %, the TCM detects a defect, turns on MIL, and records the diagnostic code.

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