C140F: owner reports and bulletins

Chassis. We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got C140F on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.

What owners report to NHTSA

6 complaints filed with NHTSA mention C140F, across 2 different models. The component owners most often filed it under: power train.

Most-reported models

VehicleComplaintsModel years reported
JEEP GRAND CHEROKEE42006

Manufacturer service bulletins that name C140F

4 technical service bulletins and manufacturer communications filed with NHTSA mention C140F, from 1 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • JEEP COMMANDER (2006, 2007, 2008, 2009), bulletin 10141242: 4WD Lamp Illuminated and Diagnostic Trouble Code C140F Active in Final Drive Control Modules (FDCM) Memory This bulletin involves verifying FDCM software level and then flash reprogramming of the FDCM with new software. …

Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.