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Home >> Subaru >> 2021 >> WRX Premium, Standard Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (2.0L) (3 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P1C00: Battery Monitor Module "A" Performance >> Notes
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DTC P1C00: Battery Monitor Module "A" Performance: Notes

DTC detecting condition: 

Immediately at fault recognition

CAUTION: After servicing or replacing faulty parts, perform Clear Memory Mode. Refer to ENGINE (DIAGNOSTICS) (W/O STI)>CLEAR MEMORY MODE>OPERATION . and Inspection Mode. Refer to ENGINE (DIAGNOSTICS) (W/O STI)>INSPECTION MODE>PROCEDURE .
  1. CHECK DTC. 

    Read DTC using the Subaru Select Monitor or a general scan tool.. Refer to ENGINE (DIAGNOSTICS) (W/O STI)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

    Is DTC P1C00 displayed? (Current malfunction)

    Yes:  Replace the battery sensor.. Refer to STARTING/CHARGING SYSTEMS (W/O STI)>BATTERY SENSOR .

    No:  Even if DTC is detected, it has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.