I've got an '07 corolla with 275k miles that has run like a top for years. Driving home yesterday cruising at 75mph it lost ignition and refused to start. Towed it home and now it says it can't communicate through obd-II port. All fuses check out and have swapped a few relays around. Voltage to battery is good. Any ideas? since I just sold my backup vehicle any help would be appreciated. Thanks. Everything in car still seems to have power and cranks.