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C1009 on the 2010 Kenworth T300

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.

Bulletins for this model year that name C1009
TIB-E0022010-09-25. Service bulletin. KENWORTH: FUEL. PX8 ENGINE FUEL PUMP HEAD CAMPAIGN. (CUMMINS C1009) CERTAIN TRUCKS EQUIPPED WITH PX8 ENGINES, REQUIRE A PRODUCT IMPROVEMENT INVOLVING INSPECTIONS AND POSSIBLE REPLACEMENT OF THE FUEL PUMP HEAD. FAILURE TO PERFORM THIS REPAIR MAY RESULT IN VEHICLES DEVELOPING AN EXTERNAL FUEL LEAK, WHICH MAY CAUSE HARD START COMPLAINT AND POSSIBLE FAULT CODES FOR LOW FUEL PRESSURE. *PE

1 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.