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Home >> Land Rover >> 2003 >> Range Rover >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Diagnosis - Automatic Transmission >> Diagnostic Tests >> BOSCH Ems Fault DTC P1646 - Ems V8 Engine Management System ECM - Can Bus Missing Node - Transmission Control Module >> DTC P1646 - EMS V8 Engine Management System ECM - CAN Bus Missing Node - Transmission Control Module >> Possible Causes

Possible Causes

  1. Circuit integrity to C0331/36 (YB). See step  1 under CHECK.
  2. Circuit integrity to C0331/37 (YN). See step  2 under CHECK.
  3. Connector C0331. See step  3 under CHECK.
  4. Electronic Automatic Transmission ECM. See step  4 under CHECK.
  5. V8 Engine Management System ECM. See step  5 under CHECK.
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