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P1685 Diagnostic Trouble Code Discussion for June 2007

Transmission Control Module Power Up Temperature Sensor Circuit Low

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Trouble Ticket Help Requests for DTC P1685
Help Request Posted
2000 Jeep Grand Cherokee Limited 4.7L Poor Idle Quality, Hesitation, Surge VIN: 15WUERFNFH
P1685: Smart Key Immobilizer Module Invalid Key. customer came in with lights dimming on instrument panel and driveability complant test ing reveled a bad alternator which was replaced with reman unit after couple days customer called with same complant.where should go from here
June 24, 2007