You can see where I disconnected the alternator it's less than 12v about half way thru the recording. Connected it's 14+ volts. I replaced the coolant sensor last nite it's a NAPA TS4052SB. My question is does the coolant sensor start a high number like 205C in open loop then drop down to 62C in closed loop? How did you read my file? All I see are all kinds of marks. Is this what is called HEX and how do I change this into letters and numbers?