All the dash tac,s went out. speedomiter gas temp all went limp while driving. on 2000 Volvo S70

the next time i started the car the check eng light came on and the car sputtered. The dash came back on and the car drove fine.. now its out again. The car has a lot of life left so help me fix er up..Thanks

Asked by for the 2000 Volvo S70
I would suggest you check your battery connections. Chassis to frame ground strap or all main ground connections. Depending where your fuse panel is located. Check for corrosion on wires.
Check salt output.alt output.