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Jaguar
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2002
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XKR Base, 2D Coupe
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Self-Diagnostics
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Diagnostic Trouble Code Identification
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DTC P0128: Coolant Thermostat Range/Performance Malfunction
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Possible Causes
Possible Causes
Contaminated coolant.
Engine coolant thermostat failure.
ECT sensor failure (ECT DTCs are also set).