Code status
Needs verification
Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.
- System
- Fuel / Air
- 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 oxygen sensor until the low-circuit condition has been separated from a wiring or driver-control fault.
Useful checks before replacing parts
- Inspect for short-to-ground, low resistance, damaged insulation, melted harness sections, or connector contamination.
- Check heater power and control with the connector loaded according to service information.
- Compare fuse and relay feeds with any other oxygen-sensor heater codes that set at the same time.
Related OBD-II codes
These nearby fuel / air entries can help compare wording and fault area. They may share the same verification status as the source database.