C0631: owner reports and bulletins
Got C0631 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
9 complaints filed with NHTSA mention C0631, 9 of them since 2015, across 1 different models. The component owners most often filed it under: power train.
Most-reported models
| Vehicle | Complaints | Model years reported |
|---|---|---|
| FORD EXPLORER | 9 | 2020 |
Manufacturer service bulletins that name C0631
4 technical service bulletins and manufacturer communications filed with NHTSA mention C0631, from 2 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:
- LINCOLN AVIATOR (2020, 2021), bulletin 10234127: Some 2020-2021 Explorer/Aviator vehicles equipped with all-wheel drive (AWD) built on or before 30-Aug-2021 may exhibit an illuminated powertrain malfunction (wrench) indicator with diagnostic trouble codes (DTC) C00A6 a…
- FORD EXPLORER (2020, 2021), bulletin 10234127: Some 2020-2021 Explorer/Aviator vehicles equipped with all-wheel drive (AWD) built on or before 30-Aug-2021 may exhibit an illuminated powertrain malfunction (wrench) indicator with diagnostic trouble codes (DTC) C00A6 a…
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.