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 clean or replace parts randomly; excessive EGR can be a valve, control, feedback, or wiring problem.
Useful checks before replacing parts
- Check for an EGR valve stuck open, incorrect vacuum control, failed control solenoid, or feedback sensor bias.
- Review idle quality, stalling, fuel trims, MAP response, and freeze-frame data from the monitor failure.
- Inspect EGR passages and valve seating for carbon that can hold the valve open.
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.