Truck wont start

2012Hino258LP

New Recruit
Fleet Owner
My 2012 Hino 258LP was running fine yesterday. Driver started it this morning and drove it for 1 km and the check engine light turned on and after 5 mins of driving the transmission light turned on and went into limp mode. Brought the truck back to the yard, truck wouldn’t move. No forward or reverse. Turned the truck off and it wouldn’t start again. All the lights work but the ignition would just click like it’s a dead battery. Ended up boosting it and it was fine for about 5 mins and same thing happened.

Any idea what it could be? Bad battery? Bad ground? Relay?
 
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