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Home >> Cadillac >> 1995 >> Eldorado Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Parameters >> Pcm Specific Input Codes >> PO21: Transaxle Pressure Control (TPC) Solenoid

PO21: Transaxle Pressure Control (TPC) Solenoid

TPC solenoid will cycle on and off about every 4 seconds.

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