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Home >> Jaguar >> 2000 >> XJ8 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Trouble Code Identification >> DTC P0128: Coolant Thermostat Range/Performance Malfunction >> Monitoring Conditions

Monitoring Conditions

Engine Coolant Temperature (ECT) 18-104°F (-8-40°C). Intake Air Temperature (IAT) more than 18°F (-8°C). Engine running at idle.

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