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Jaguar
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2001
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XJR
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Diagnostic Trouble Code Identification
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DTC P1609: ECM Microprocessor-To-Microprocessor Communication Failure
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Possible Causes
Possible Causes
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ECM FCCP (programming) circuit (ECM harness connectors EM80 terminal No. 19 or 27) shorted to ground.
ECM failure.