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P0116 - Engine Coolant Temperature Sensor 1 Circuit Range/Performance

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
P0116 - ENGINE COOLANT TEMPERATURE SENSOR 1 CIRCUIT RANGE/PERFORMANCE

Description:  This DTC indicates that an engine coolant temperature (ECT) sensor range performance concern has been detected. The DTC sets when the vehicle has been driven above 1, 250 RPM without the ECT sensor signal increasing above 70°C (158°F). The time to set the concern depends on the engine coolant and intake air temperatures and can vary between 20 and 60 minutes.
Possible Causes: 
  • Low engine coolant level
  • Damaged thermostat
  • Damaged ECT sensor or circuit
  • Damaged PCM
Diagnostic Aids:  Make sure the intake air and engine coolant temperatures are similar when the engine is cold. Make sure the ECT sensor and the actual engine operating temperatures are the same.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST K .