LS MT125 won't start error code

[ThirdMan]

When trying to start the engine won't turn over. It reports 4-1 over u001 on the display.
I took out the battery. It has a green light on top and measures just under 13 volts.
Does anyone have the service manuals or error code list?
Same tractor as MT122 with more horsepower.
Someone on the LS service group had this question (Google shows me part of the question) I requested access and will check there when I get approved.

 

[ThirdMan]

The person on Facebook didn't get an answer.

 

[ThirdMan]

After checking several things, but making no real sense of change it started.

 

[ThirdMan]

Same error and won't start again.

 

[Cycledude]

How long have you had this tractor ?

 

[ThirdMan]

I bought it May 2017.

 

[ThirdMan]

It was the battery. It measured at 13 volts, but after charging it the tractor started right up.

 

[5030]

Replace the battery or you'll have the same issue again. Some batteries last, some don't. 13 volts isn't enough, you need 14 standing.