DTC P0116: Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance: Notes
WARNING: This page is about a different car, the 2002 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
If DTC P0115 and DTC P0116 are output together, ECT sensor circuit may be open. Diagnosis and repair DTC P0115 first. See DTC P0115: ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT .