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P1116

Engine coolant temperature (ECT) sensor - signal out of range

Engine coolant temperature (ECT) sensor - signal out of range

Applies to: All X-TYPE variants, 2001-2009 (saloon & estate) · Confidence: Manufacturer code list + field-verified causes

Common causes

  • ECT sensor drift
  • Wiring high resistance
  • Thermostat fault skewing readings

Quick checks

  • Scan access: Jaguar-specific: WDS/IDS or a Jaguar-capable scan tool
  • Prefer official/field-verified path before guessing sensors

Typical fixes

  • Compare ECT against an infrared thermometer on the housing
  • Replace ECT sensor
  • Replace thermostat

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