RE: 853 with BOSS. I am receiving an EC 2.1 (engine coolnat temp warning) error code that will not clear and seems to prevent it from restarting. I thought I remembered disconnecting the battery and relays would reset. But that doesn't seem to help. I've tried bridging the sensor as well but I get an EC 3 sensor missing error and EC 4 wiring short code. Sounds like a bad relay and/or sensor or BOSS any way to tell? would appreciate any suggestions. Thanks