OBD code information sheet
https://obdauto.ro/cod/P0851?lang=en
Park / Neutral Switch Input Circuit Low
Technical explanation
Park/Neutral switch input: The electrical input is below its permitted range. This signal-level finding does not by itself establish a mechanical failure. The switch request and the actual driveline engagement are different. Confirm the vehicle wiring and do not bypass starting or engagement interlocks.
Verified definition
The code meaning is verified; general system guidance remains separate from code-specific diagnosis.
Imported definition; diagnostic information is not yet editorially reviewed. The code does not confirm a failed part.
Sources, methodology and limitations
- DTC Database — definiții OBD-II
Supports: code definition, community definition
- Catalogue MIT licence
General sources explain definitions and principles; they do not confirm a universal repair. Use VIN-, engine- and controller-specific service information.
How we research the information →
