Code status
Needs verification
Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.
- System
- Transmission
- Scope
- iso-sae-controlled-p0
- Standard
- SAE J2012 / ISO 15031-6
- Source
- legacy-import
Diagnostic boundary
A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.
Do not replace the TCM before checking the relay control circuit; an open relay path can make a good module appear offline.
Useful checks before replacing parts
- Check relay coil power, control ground or driver circuit, fuse feed, relay socket terminals, and command state.
- Compare relay command with actual relay output voltage and TCM power input at key-on and during cranking.
- Inspect wiring damage, corrosion, water intrusion, and related TCM power input or communication codes.
Related OBD-II codes
These nearby transmission entries can help compare wording and fault area. They may share the same verification status as the source database.