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Jaguar
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2000
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XJR
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Repair and Diagnosis
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Engine Performance
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System
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Diagnostic Trouble Codes - Powertrain
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Diagnostic Trouble Codes
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DTC P1609: ECM microprocessor-to-microprocessor communication failure
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Possible Causes
Possible Causes
ECM FCCP (programming) circuit (ECM pin EM11-3) short circuit to ground
ECM failure