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Home › Jaguar › 1999 › XJ8 Base, 4.0 0 › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Trouble Code Identification › DTC P1649: ECM Flash Programming Circuit Malfunction › Possible Cause

Possible Cause

ECM to Data Link Connector (DLC) circuit shorted to ground or shorted to voltage.

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