P0900: owner reports and bulletins

Powertrain (generic, all makes). We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got P0900 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

No consumer complaints filed with NHTSA mention P0900. That usually means it's rare, or owners don't quote the code when they file.

Manufacturer service bulletins that name P0900

2 technical service bulletins and manufacturer communications filed with NHTSA mention P0900, from 1 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • FORD FOCUS (2016, 2017), bulletin 10178055: Certain 2016 through 2017 Model Year Focus equipped with a DPS6 Automatic Transmission - Replacement of Clutch Actuator Motors In some of the affected vehicles, customer may report erratic shifting, missed gear shifting,…

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.