I get "service battery charging system"
I think the vehicle might have battery current sensor..could this be defective causing the service battery sys message?

The fuse to the starter is burnt..Just like it used to do. I had this starter tested once at autozone. I wonder if the starter can short intermittently and blow the fuse and then all I get is a click ? I think we had tested the cable from battery to starter and it was continuous.

That'* not [leftover air pockets] or whatever. Consuming that much coolant is a serious problem. Take it back to the mechanic, point at it, and cry. The mechanic needs to fix it. Did the mechanic test it at all after putting it back together?

Sounds like it is not charging. Someone should put a volt meter on it while it is running then report back.

Let'* see, drinking coolant, now it won't turn over, and the big starter fuse is burnt. I'd guess it'* got a cylinder full of coolant and probably a leaking head gasket or intake gasket or something.

I'm still curious about these questions . . .

He test drove the car for about 30 minutes. I will check him on Monday to see if he can look at it again (he is 75km away and my car can't be driven there) . Last time I mentioned the coolant loss, he wasn't worried but said that you would get a lot of white smoke if coolant was leaking.

How would you know if coolant was making it into the engine other than white smoke. Would you take the spark plugs off and put a narrow strip of tissue down into the cylinder and see if it comes back wet?

Also, the car did give a message at some point stating battery charging system needs servicing. The car has battery current sensor ...If this part is defective, can it cause lack of start and fuel pressure sensor error code I got.

It should not be losing coolant after 30 minutes of driving. All air pockets would be worked out.

He'* not worried? This is a bad sign. He just basically overhauled it, reassembled it and test drove it for 30 minutes and it is losing coolant as soon as you get it and he'* not worried? Once again, I have my doubts about this mechanic. Where is it going? If it is not coming out on the ground, not leaking somewhere under the hood, not turning your engine oil into a chocolate milk shake, not showing up in the transmission fluid, and not coming out of the exhaust, then it would not be disappearing. But it is disappearing, even after at only 30 minutes plus 75km of driving. The coolant is going somewhere.

If it is a slow leak then you wouldn't get a lot of steam. If the weather is cold, it would blend in with the normal wisps of exhaust vapor.