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Home/DTC Codes/Tesla/Model S/2014-2016 P85D Dual Motor AWD/P0115
P0115

Engine Coolant Temperature (ECT) Sensor 1 Circuit

2014-2016 Tesla Model S P85D Dual Motor AWD

Moderate SeverityPowertrainGeneric (SAE)

Description

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.

Related Codes

P0116ECT Sensor 1 Circuit Range/PerformanceP0117ECT Sensor 1 Circuit Low InputP0118ECT Sensor 1 Circuit High InputP0119ECT Sensor 1 Circuit IntermittentP0125Insufficient Coolant Temperature for Closed Loop Fuel Control

Other Powertrain Codes

P0115 on Other Vehicles

Tesla Cybertruck

2024-2024 Cyberbeast Tri Motor AWD

Tesla Cybertruck

2024-2024 Dual Motor AWD

Tesla Cybertruck

2024-2024 Single Motor RWD

Tesla Model 3

2017-2020 Long Range Dual Motor AWD

Tesla Model 3

2017-2020 Performance Dual Motor AWD

Tesla Model 3

2017-2020 Standard Range Plus Single Motor RWD

Tesla Model 3

2021-2024 Long Range Dual Motor AWD

Tesla Model 3

2021-2024 Performance Dual Motor AWD

Common Questions

What does code P0115 mean on a 2014-2016 Tesla Model S?

P0115 stands for "Engine Coolant Temperature (ECT) Sensor 1 Circuit". General malfunction in the engine coolant temperature sensor circuit.

What are the symptoms of P0115 on a Tesla Model S?

Common symptoms of P0115 include: Check Engine Light, Poor fuel economy, Hard starting, Incorrect temp gauge reading, Fans not operating correctly.

What causes P0115 on a 2014-2016 Tesla Model S?

Common causes of P0115 include: Faulty ECT sensor, Wiring damage, Corroded connector, Low coolant level.

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