Battery light comes on while driving with a loss of power?

problem could be in instrument panel circuit. a wire might be broke or melted on the circuit board. may have intermitting touch of broken wire causing gauges and lights to flash on an off.

you need to check your battery terminal after that check battery voltage then check your alternator may be the regulator that can't keep constant current flow .

It can be related to the transmission repair such as power ground not being sufficiently connected,because this is intermittent,There is also a Technical bueletin from BMW about power loss, and no crank situation No. SI B 12 03 06, engine electrical system

is the belt stretched out! or the tensioner is weak, and not holding enough pressure on drive belt. if in doubt replace the belt. there should be marks on tensioner for the belt tension. if battery and alternater are ok. then it has to be the belt, tensioner, are the battery connection clamps, clean and tight! good-day !

when this stall happens notice if the speedometer drops to "0" while the vehicle is in motion, if some warning lights aren't lit (chk engine, ABS, brake etc.) when key is set to "On"!! If these issues happen when the vehicle "shuts off while driving" it may be caused by "ignition switch failure". Your vehicle may be part of a 2002 Honda/Acura recall. Symtoms include: intermitted power loss, intermitted engine shut off, some warning lights not lit, random hard starts. This happens more often in warmer/hot weather. Call your local dealer and provide them with your VIN# to check if your vehicle is still covered, they may fix it for free. Otherwise the part is about $48-$100!!

Voltage Regulator is bad replace it

The "check gage" when ever the engine coolant is high or the engine oil pressure is low. First step of diagnosis, check the coolant level and your oil level immediately and then go from there. Hopefully, this will help you to FixYa problem!

make sure your battery posts are screwed tightly

Take it to Advance auto or Auto zone, let them connect a scanner, (free of charge) , they can read the codes & most cases tell you what part or system is failing.

you must take your car to be put on the diagnosis computer