95 buick pa security light

[old orange]

Car has 119,000 mi. ,security light would stay on a while . Now driving car will miss an check eng light will come on afew seconds an go off. Sometimes when this happens eng will die , stop turn key off, restart check light off. May drive 20 mi. no problem with security light on. Shop said it has 4 codes crank sensor, cam sensor, pass key security, an one they didnt know. Help