Scan says CPM is the problem. temp guage quit working, then it started going into gear really hard then didnt want to crank when I went to the local convenience store. What is the CPM & how much should it cost to replace?

a malfunctioning temperature sensor will often send incorrect information to the vehicle's on-board computer. As a result, when the vehicle reaches a normal operating speed the sensor may relay an incorrect signal to the computer that the engine is overheating resulting in engine shutdown. The vehicle will not be able to start again until the engine has completely cooled and will need to have the sensor replaced in order to prevent the recurrence of the problem. a malfunctioning temperature sensor will often send incorrect information to the vehicle's on-board computer. As a result, when the vehicle reaches a normal operating speed the sensor may relay an incorrect signal to the computer that the engine is overheating resulting in engine shutdown. The vehicle will not be able to start again until the engine has completely cooled and will need to have the sensor replaced in order to prevent the recurrence of the problem.