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Home >> Jeep >> 2021 >> Grand Cherokee L Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 25 (8HP75 Automatic Transmission - DTCS P1D79-00 To U1489) >> Diagnosis And Testing >> P1DD0-00: TCM Monitoring Processor Performance - UNALLOWED Park Engagement >> Theory Of Operation

Theory Of Operation

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The purpose of this diagnostic is to detect an unwanted disengagement of the Parking Lock.