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 confuse a heater-circuit code with a mixture-reading code; the fault path starts with heater power, control, and wiring.
Useful checks before replacing parts
- Check heater power, ground or control, fuse condition, connector damage, and harness routing near hot exhaust parts.
- Measure heater resistance or current only with the correct service information and temperature conditions.
- Look for other sensor-heater codes that may share a fuse, relay, or ground path.
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.