It was a cooler day here in TX and my 233K mi CRD started normally and then died as I took off from driveway. Cranked but would not start. Scan code was P0093 "massive fuel leak". Well, there was no fuel dripping to ground, and no fuel leaking at heater connectors. No diesel fuel seepage seen. Oil level OK.
I reset the error code (via Autozone OBDII/Brake free rental) and then manualy pumped the fuel head for many pumps - and then whoo-la - diesel leakage problem observed oozing at fuel filter gasket connection. Fuel filter turned out to be quite loose and after tightening her back up and a few more manual pumps, Libby then started up after a few cranks with no issue. $0 fix
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Hope this helps somebody!