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2011 LINCOLN MKX
3.7L V6•AWD•AUTOMATIC•gas
3 active safety recalls on this vehicle — view recalls
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Repairs0Labor957Torque6412Fluid16DTC2254Battery2Maintenance0Recalls3
P0115moderate severityPowertrain

Engine Coolant Temperature (ECT) Sensor 1 Circuit

on 2011 Lincoln MKX 3.7L V6 · AWD

What this code means

General malfunction in the engine coolant temperature sensor circuit.

Symptoms

  • Check Engine Light
  • Poor fuel economy
  • Hard starting
  • Incorrect temp gauge reading
  • Fans not operating correctly

Common causes

  • Faulty ECT sensor
  • Wiring damage
  • Corroded connector
  • Low coolant level

Diagnostic steps

  1. Test ECT resistance at known temperature
  2. Inspect wiring
  3. Check coolant level
  4. Compare ECT to IAT at cold start

Repair notes

Replace ECT sensor or repair wiring. Verify coolant level.

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