We took the Rondo to Stokes Tire Pros in Santa Monica to figure out what was going on with our tire pressures. We got some funky readings:
Left front: 10 psi
Right front: 25 psi
Left rear: 26 psi
Right rear: 11 psi
Recommended: 32 psi
A nail was the culprit in the right rear, which the guys at Stokes patched. At our request, they also did a thorough examination of the front left tire that was reporting 10 psi. They pulled it off, inspected it, replaced the valve stem core, cleaned the wheel bead and the rebalanced it. No other leaks were found. All four tires are now up to the recommended pressure.
Total cost: $42.50
Laura Burstein, Automotive Editor @ 16,268 miles

opfreak says:
10:31 AM, 07/28/08
all that work for 42 bucks. what did you guys do? hold up the shop?
cruiserhead1 says:
08:15 AM, 07/29/08
I wonder how long it was so low? This would affect your overall MPG's by quite a bit.
jahfakin says:
04:35 AM, 07/31/08
I thought most new cars come tire pressure sensors? even my 16K econobox has it.
flipb says:
01:39 PM, 08/ 7/08
The Rondo does have a tire pressure monitoring system. Did it alert you?
(In the Rondo, it's a generic tire pressure alert, not a readout of the actual psi.)