The powertrain control module or engine control module will automatically clear

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.

It would be true sodium reacts with water in a violent way 

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

Answer/when the cell uses energy;