What causes the LE error to display on the LG washer 2004 Model# WM2277HW?

My LG washing machine model # WM2277HW came up with the LE code. The machine just shut down. I initally called LG and reset it. That didn't work very long. I then called for service. The first service call the sensor was replaced with a cost of $272. One week later the second call the repairman replaced the motor ( no cost). Unfortunately, both did not work. The machine still has an error code of LE. My third phone call to the repairman 2 weeks later, he claims now it could be the circuit board additional cost of $45. It was also mentioned it could be the circulating pump with additional cost. This has happened all within a 4 week period. I don't want to put anymore money into this machine. I don't know what to do. Please help!!!!!