Black duct tape
You have to disconnect the battery for couple minutes.
I had the engine light come on in my patrol due to overheating and I had to take the vehicle to the dealer's service centre where they plugged it into the computer which advised why the light came on and then reset it. There was a minimal service fee for this. I assume it will be the same process for the Mazda.
If you are referring to resetting the Check Engine Light then you will need to have someone with a scanner to do it. If you are referring to reprogramming the Engine Control Module then the dealer will do it.
Actually Engine Management systems are sophistication systems for good operation of Engine. May be the cooling control system get affected which leads to overheating of engine.
To reset the service engine soon light on a 2004 GMC Envoy you can remove the ECU fuse. ECU stands for electronic control unit.
Valves will clatter if the engine is overheating.Valves will clatter if the engine is overheating.
Resetting the PCM, or power train control module, requires access to the engine bay. To reset the control module simply unplug the negative battery cable from the battery for five seconds.
The engine could possibly seize.
it may be because the aircon swithch is on. or someone shorted it to work as a prevention to engine overheating.
More than likely its the ( E.C.M) engine control modular, And has to be programed.
The engine control module "learns" how to set the idle speed. When you disconnect the battery the engine control module loses that memory and it has to be reset. To regain the setting drive the car for several miles at moderate speeds and it is reset.