Water - Moisture problem? corrosion concerns

Have you checked the plastic tray under the windshield wipers? There is a drain hole underneath, and when it gets plugged up you get that sloshing sound.

Tom

 

When you hear any sloshing, I recommend that you should clear the drain holes to prevent corrosion of the steel cowl pan. See the following string for info about how to access the cowl assembly and clear the two drain holes.
http://priuschat.com/forums/prius-m...emoval-owners-w-mice-stinky-ac-take-note.html

 

My understanding is as follows:
Reading or having someone else read the OBDII trouble codes should not affect your warranty. That's one of the major benefits/uses of the ScanGuageII. I probably would not reset the engine light if under warranty. I would take it to the dealer without mentioning that I had scanned for the codes. I would use the knowledge to confirm or question the dealers diagnosis. Below is a warranty link that I found informative.

Keeping Your Mod's Warranty Intact - For Dummies

 

fixed link

Keeping Your Mod's Warranty Intact - For Dummies

 

If the check engine light (aka the amber light that looks like an engine) is the only light that is on, make sure that your gas cap is tightened at least one click.

There is no warranty problem with your reading the DTC yourself (if you have access to an OBD-II code reader) but inexpensive code readers may not be able to access all codes produced by the various Prius ECUs.