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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (Automatic Transmission - 5L40-E (DTC P0748 To P1832)) >> Automatic Transaxle Diagnosis >> DTC P0974 >> Diagnostic Aids

Diagnostic Aids

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DTC P0974 may set when a communication fault exists between the ECM and TCM. Inspect for DTC U 0100. If this DTC is present, diagnose it first.