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Sure ECU,s keep tracks. But how a voltage of 4.5V (instead of 2.5V) for the last 20 miles driven on record will prove that you overheated the car and it wasn't a faulty coolant temp. sensor, O2 sensor etc.???? A mechanic looks for faulty sensors not for guilty people. ECU's are made to control your car and to help mechanics find and fix a problem.
Service Manager (not even having an idea how to read the HDS): we hooked the computer and it shows that you been driving very hard...your waranty is VOID, give us your money!!!!!!
Uneducated you: Wow those computers are really smart, they know everything I do........Here, I will pay for the damage.
Educated you: Sir, I have no idea what are you talking about.... Can it be a faulty sensor or/and/maybe the ECU itself which caused the damage. Can you explain to me in detail what exactly did the computer show and what does it mean, since I don't understand............
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