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P1117
Engine coolant temperature (ECT) sensor - intermittent signal
Engine coolant temperature (ECT) sensor - intermittent signal
Applies to: All X-TYPE variants, 2001-2009 (saloon & estate) · Confidence: Manufacturer code list + field-verified causes
Common causes
- Intermittent open in ECT circuit
- Corroded ECT connector
Quick checks
- Scan access: Jaguar-specific: WDS/IDS or a Jaguar-capable scan tool
- Prefer official/field-verified path before guessing sensors
Typical fixes
- Wiggle-test harness while monitoring ECT
- Clean/replace connector
- Replace ECT sensor