Look out! There's car rental trouble ahead

Last summer's auto rental problems may get worse in the weeks ahead. Here's the fix.

It's the summer sequel no one wants — and no one thinks about.

Call it Carpocalypse II: The supply-chain challenges and fleet problems that plagued car rental companies last summer are back again. And if you don't watch out, they could run your next vacation off the road.

"Demand for rental cars will be strong for the summer season, likely even stronger t…