A federal judge in Michigan has certified a class action against Ford over the Bosch CP4 high-pressure fuel pump in 6.7L Power Stroke diesel trucks, according to reporting by Pickup Truck Talk and MotorBiscuit. The ruling, issued on September 30 in Droesser v. Ford Motor Company in the Eastern District of Michigan, covers owners in five states: California, Louisiana, Ohio, Pennsylvania and South Carolina. It is not a nationwide class.

What the case is about

The lawsuit, first filed in 2019, covers Super Duty trucks from the 2011 model year on with the 6.7L Power Stroke. Its claim is about fuel. The CP4 pump is lubricated by the diesel flowing through it, and the plaintiffs argue that American ultra-low sulfur diesel lubricates it less than the European fuel the pump was designed around, so the pump wears, sheds metal and can take the injectors and the rest of the fuel system with it. Ford denies that the trucks share a common defect, and the reports note that the court also ruled for Ford on some claims.

That puts this case in an odd position. Ford's own manual asks for exactly the fuel the plaintiffs blame: ultra-low sulfur diesel meeting ASTM D975, the standard that also sets the minimum lubricity for U.S. diesel. If the claim is right, the problem is not owners using the wrong fuel. It is the pump meeting the right one.

The fuel the plaintiffs blame is the fuel Ford's manual asks for.

Who is in, as reported

Coverage of the order says the classes include buyers in the five states who did not sign a mandatory arbitration agreement with the dealer and who paid for CP4-related repairs out of pocket without being reimbursed. Certification is not a verdict and not a settlement: it means the case can go forward as a group. There is no payout, and no claim form, yet. Earlier NHTSA recalls and Ford service actions on the CP4 dealt with biodiesel deposits, not the lubricity question at the center of this case.

Our viewIf you own a 6.7L Power Stroke in one of the five states and have paid for a CP4 failure, keep every invoice, the parts list and any dealer diagnosis; that paperwork is what a claim will turn on. If you are outside those states, nothing changes for now. For everyone with a Power Stroke, the practical side is the same as before: buy fuel from busy stations, change the fuel filters on schedule, and keep up with the oil changes on our Super Duty oil capacity page. We will follow the case as it moves.

Sources

  • Pickup Truck Talk, "Judge OKs Class Action Suit Against Ford for Faulty Fuel Pumps", Oct 2026
  • MotorBiscuit, "Ford's 6.7L Power Stroke Trucks Face Class Action Over Costly Fuel Pump Failures", Oct 2026
  • U.S. District Court, E.D. Michigan, Droesser v. Ford Motor Company, No. 2:19-cv-12365
  • 2025 Ford Super Duty Owner's Manual, p. 209 (diesel fuel requirements)