DTC P0116:00 [L5]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITIONS & POSSIBLE CAUSES

DTC P0116:00	ECT sensor circuit range/performance problem
DETECTION CONDITION	The PCM monitors the maximum value and minimum value of engine coolant temperature when the engine is started and 5 min have been passed after leaving the vehicle 6 h or more. If difference between maximum and minimum values of engine coolant temperature is below 6°C {43°F} the PCM determines that there is an ECT circuit range/performance problem. Diagnostic support note This is a continuous monitor (engine cooling system). The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	ECT sensor connector or terminal malfunction ECT sensor malfunction PCM connector or terminal malfunction Thermostat malfunction PCM malfunction

DTC P0116:00

ECT sensor circuit range/performance problem

DETECTION CONDITION

The PCM monitors the maximum value and minimum value of engine coolant temperature when the engine is started and 5 min have been passed after leaving the vehicle 6 h or more. If difference between maximum and minimum values of engine coolant temperature is below 6°C {43°F} the PCM determines that there is an ECT circuit range/performance problem.

Diagnostic support note

This is a continuous monitor (engine cooling system).
The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
FREEZE FRAME DATA is available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

ECT sensor connector or terminal malfunction
ECT sensor malfunction
PCM connector or terminal malfunction
Thermostat malfunction
PCM malfunction