My guess is you have a faulty temp sensor, replace it.
could be PO118= PO118 Engine Coolant Temp Circuit high =coolant temp sensor. Take to Auto zone or Advanced Auto (if in your area) and they will run a free diagnostic and tell you the code and what the issue is. Mine was the PO118.
Check here; http://www.obd-codes.com/p0118 It gives a very good explanation of how the system works, what symptoms you might encounter and how to fix it.
high resistance coolant temperature sensor, is it overheating,air in coolant pipe at sensor, or bad sensor,
P0118 is an OBD II (on board diagnostic) generic code. It's explained as : P0118 - Engine Coolant Temperature Circuit, High Input.
The code PO118 on a Mazda MPV indicates a problem with the engine coolant temperature sensor (ECT). This code typically means that the sensor is reading a temperature that is higher or lower than expected, which can affect engine performance and fuel efficiency. It may be caused by a faulty sensor, wiring issues, or problems with the engine's cooling system. It's advisable to diagnose the issue further and potentially replace the sensor if needed.
Trouble code P0118 means: Engine Coolant Temperature Circuit High Input Replace the coolant temp sensor
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