any ideas?

we moved from cali to illinois and was wondering if there is anything we need to do to the car to prepare for cold weather

 

Step #1 - get the codes read. Your truck is trying to tell you what's wrong with it.

About the only thing you should need to do is to check the coolant concentration to make sure that it is good for the temperatures with good margin.

If you were running 10w30 motor oil, you probably will want to switch to 5w30.

 

The code went away as soon as I left the driveway (semi-sloped)

 

Coolant, hoses, belt and battery. I would also recommend running 5-30 in the winter. I'm next to you hear in Indy and it's frigid right now.

 

What should I do to the 4 items?? Insulate them?

 

No, just take it in to your local shop and have them check it out for you. Like Swart said, make sure the coolant concentration is good, (usually is) unless someone has messed with it. Just make sure the belts and hoses are in good condition and make sure you have a good battery. Takes a lot of juice to start on a 0 degree morning.

 

I heard it's the cold that causes the battery to discharge faster.

I was planning on getting a marine battery and upgrading the electrical system to bigger wires since getting an amp and sub.

 

Just because the light went out doesn't mean that the code is gone. It will still be stored in the history and can be pulled.

 

Ok cool. my dad bought the obd tool because his truck is an 03 sonoma so I'll hook it up when we find it.

 

On the battery... Just get a good high cranking amp battery. Deep cycle batteries (like marine batteries) are not meant for automotive use as a primary battery.