CEL on the highway making Wal-mart pitstop

[Perfectlap]

So of course this happens on the way back home of a long drive on a Sunday evening and the day after I took the OBD scanner out of the car. ...
the check engine light just came on. I pull over thinking I might have left the oil cap loose last night. I checked the dip stick and it seemed pretty dry. The not so accurate digital oil level gauge indicated one bar below so I added a 1/4 of a bottle of Syntec. Let it sit a bit tried the digital gauge again and it back to being on the money.
Fast forward 30 minutes ago and the oil cap is not loose. But... The coolant is way low about half of the minimum hash mark.
I'm about to run into the wal-mart and top it off. I recently had the tank flushed.

Suggestions before I pull a stupid? Leaking/cracked tank?

[extanker]

maybe some air got burpped out

[Perfectlap]

just checked it again and the coolant is lower than I first noticed or its leaking fast.
There's barely a 1/4 inch of coolant showing.
Oil temp and level is fine though.
What kind of water should I mix the coolant with?
looks like I'm headedfor the Indy first thing tomorrow..

Hmm wal mart only has dex-cool, peak and super tech brands.

[extanker]

only what ive read on the internet....peakglobal lifetime....if they have distilled water put that in until you see a shop...myself..i would put water in it so i didnt have to walk home

[Boxtaboy]

Being only one bar down on the digital oil gauge should not give you a CEL, so the oil level has nothing to do with it. If your oil cap was loose, the car would idle funny. If your coolant is leaking out, your coolant light should go off, not the CEL, so that's a little strange I'd think. Can you see coolant leaking out anywhere?...under the center of the car (water pump), or right in front of the rear wheel (coolant tank/bleeder valve)?

I'd refill with distiller water until you can get back to the indie shop.

[Perfectlap]

how much water should I add?