Details On DTCs

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0116:00 (PCM, SKYACTIV-G, US) DETECTION CONDITION AND POSSIBLE CAUSE

Description	ECT sensor No. 1 circuit range/performance problem
Detection condition	Determination conditions	During the 7 min after the engine is started, the engine coolant temperature does not increase above 3°C {5°F}.
	Preconditions	Before starting the engine, leave the vehicle with the engine turned off for 6 hours or more. The following DTCs are not detected: ECT sensor No. 1: P0117:00 and P0118:00
	Drive cycle	1
	Self test type	CMDTC self test
	Sensor used	ECT sensor No. 1
Fail-safe function	Not applicable
Vehicle status when DTCs are output	Not applicable
Possible cause	ECT sensor No. 1 connector or terminals malfunction PCM connector or terminals malfunction ECT sensor No. 1 incorrect installation ECT sensor No. 1 malfunction Poor assembly of engine coolant hose (engine coolant passage malfunction) Poor engine coolant, leakage, or freezing Use of unspecified engine coolant Coolant control valve malfunction PCM malfunction