Cummins L9 Hose Recall Reaches 26,729 Kenworth and Peterbilt Trucks

Paccar told federal regulators on Oct. 22 that it is recalling 26,729 Kenworth and Peterbilt trucks whose Cummins L9 engines can leak fuel and stall. The filing, NHTSA campaign 26V700 and Paccar's own 26PACJ, is the largest of the truck-maker recalls flowing out of a Cummins engine recall submitted on Sept. 28 that covers 39,052 L9 engines in total.

The defect sits in the remote fuel filter hoses. Cummins told NHTSA the hoses "can become separated from the fitting, resulting in fuel leaks and lack of fuel supply to the engine," and traced it to insufficient crimping of the hose connector. Cummins estimates 3 percent of the recalled population actually carries the bad crimp, which works out to roughly 1,200 engines. The affected engines were built between Dec. 7, 2020 and Apr. 10, 2026, and Cummins stopped using the suspect hoses on new builds the following day. A truck that is about to have the problem usually says so first: the engine logs a low fuel pressure fault, code FC559, and lights the dash lamp.

Paccar's share of the recall covers Kenworth T270 and T370 from 2022 to 2023, T280 from 2022 to 2027, T380 and T480 from 2023 to 2027, Peterbilt 548 from 2022 to 2027, Peterbilt 536 and 537 from 2023 to 2027, and the 2025 Peterbilt 567. Daimler Truck North America filed its own version on Oct. 7, campaign 26V660, for 2,592 vehicles including the 2022 to 2025 Freightliner Business Class M2 and the 2023 Freightliner 108SD. Between them the two truck makers account for 29,321 of the 39,052 recalled engines, just over three quarters.

The transport angle

Read that model list again and you are looking at the medium-duty chassis that small enclosed operators run. The Kenworth T280 and T380, the Peterbilt 536 and 548, and the Freightliner M2 are the trucks under two-car and three-car enclosed trailers and under single-car enclosed straight trucks. The nine-car open haulers that move most of the country's vehicle volume run Class 8 engines, the Cummins X15 and the Detroit DD15, and are not in this population at all.

So the recall lands almost entirely on the small end of the enclosed segment, which is exactly where single-car and two-car enclosed moves get fulfilled. NHTSA's records do not break the recalled trucks out by body type, so there is no published count of how many are car haulers. What is knowable is that the chassis overlap is high and the timing is poor.

Paccar's owner notification letters do not start going out until Dec. 20. Daimler's go out Nov. 20. That puts the shop work in the middle of the southbound snowbird season, when northeast and midwest lanes into Florida are already the tightest they get all year. A truck in a bay for a hose replacement is a truck not running the Greenwich to Palm Beach lane that week. The repair itself is free and quick, but shop appointments in December are neither.

The failure mode is a schedule risk rather than a cargo risk. A hose that separates strands a loaded trailer on a shoulder and adds a day or two to a delivery window. It does not damage the car inside, and cargo coverage pays for damage, not for delay.

What to do about it

If you are booking an enclosed move for December or January, move your request up by a week or two against your usual transit estimate. Carriers in our broker network that pull small enclosed trailers are the ones most likely to lose a day to this, and the cheapest fix is lead time.

When a truck is assigned, you can ask for the VIN and check it yourself at nhtsa.gov/recalls before the car is loaded. If it comes back under 26V700 or 26V660, ask whether the hose work has already been done. A yes closes the question. A no is worth knowing before a $300,000 car is on the deck for 1,200 miles, and is a reasonable basis for asking for a different truck.

None of this should move your budget. Recall repairs are warranty work, not a cost the carrier passes down, so the cost ranges for enclosed lanes are unchanged by it.