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 cooling parts only because the engine seems to run rich or the fan behaves oddly; first prove the temperature signal is valid.
Useful checks before replacing parts
- Compare coolant temperature, intake-air temperature, and ambient temperature after a cold soak.
- Inspect coolant-temperature sensor wiring, connector terminals, sensor ground, and coolant contamination at the connector.
- Check whether fans, enrichment, or temperature-gauge behavior match the scan-tool reading.
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.