My 01 LX was fine when my son drove to work Friday night. When he came out, nothing. Turn over, nothing. Even power door locks couldn't lock/unlock. Had to have towed to my house as AAA tech could not obviously check battery, starter, alt. Did have check engine light on before for a bit showing like could be spark plugs, 02 sensor-which supposedly were already replaced. Could it be the whole electrical system? I don't know. TIA!

 

Welcome in,try to pull codes,could possibly be a cam position sensor.