Got a '93 GCZJ/5.2L that the VIC keeps claiming the "COOLANT SENSOR" needs to be replaced. I've replaced it 3X-the last X 3 days ago! And yes, the VIC says once again, "COOLANT SENSOR" needs to be replaced!!! What is going on??? Fortunately the sensor has a lifetime warranty so it doesn't cost me anything but this ain't right!?! Is there a specific "brand" of sensor I should be using? What could be causing this?