Code status
Needs verification
Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.
- System
- Emissions
- 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 EGR valve before checking clogged passages and feedback sensors; low flow can come from restriction, control, or measurement faults.
Useful checks before replacing parts
- Check EGR valve operation, passages, vacuum or electrical control, differential-pressure feedback, and carbon blockage.
- Review freeze-frame data to see when the EGR monitor failed and whether other airflow or MAP codes are present.
- Confirm flow with the manufacturer test procedure rather than judging by valve appearance alone.
Related OBD-II codes
These nearby emissions entries can help compare wording and fault area. They may share the same verification status as the source database.