P1810-00 Error

[Rustybolts57]

Hi all, I am new to the forum and relatively new to Land Rovers. I bought this 2010 LR4 not too long ago, it had been sitting for several months and had quite a few issues, most of them have been sorted out. This is about the last error that needs sorting out.
I get this code coming up after a few consecutive drives done in a short period. I also get a transfer case low voltage code. I have cleaned the engine to body and body to battery grounds. Later all will be well. Any thoughts anyone? I do not own a Gap tool.
Thanks

 

[Rustybolts57]

Update: I'm thinking that the errors are caused by low voltage while cranking. I have been monitoring the voltage, sometimes while cranking it would dip below 9 volts, that aligned with the times I would get the error. I'm not sure why it would only drop that far sometimes but below 9 volts is enough to shut the computer down briefly and cause errors. I'm going to replace the battery this week and see how that goes. Age isn't on the batteries side at this point. If that fails I will have to check the starter current draw.