Check engine light on and off

[dennis powell]

no,all codes that sat as history are no longer active,its just telling you that the ecu encountered problem previuosly.unless that concerned reappear, then it will, but this time is as current.

[4JGtootsie]

Baka accessories/acc lang and on at hindi ignition/ig.
Nonetheless acc can still drain the battery because of pilot lights and sound system.
Its also possible na charge light lang yung nakita mo.
If its really ignition that was turned on, did you ask him why does he have to leave it on?
Sir Dennis is correct the ECU/ECM must always have enough power for it to run operations if not it will not let the engine run or shut it down (sometimes derate or limp)

[speedyfix]

if that's the case just remove the battery for 30 seconds and it shouldn't happen again.