P1115 – Engine Coolant Temperature Sensor Circuit (Nissan)

Description

The ECM detected an electrical malfunction in the engine coolant temperature sensor circuit.

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Symptoms

  • Hard starting
  • Poor fuel economy
  • Rough idle
  • High idle
  • Check engine light

Causes

  • Faulty ECT sensor
  • Open or shorted wiring
  • Connector corrosion
  • ECM driver fault

Diagnosis

  • Test sensor resistance
  • Inspect wiring
  • Check connectors
  • Scan live data

Repair

  • Replace ECT sensor
  • Repair wiring
  • Clean connectors

Related Problems

Related Fault Codes