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 assume the pressure sensor is wrong without measuring or comparing pressure; true overpressure can affect drivability and emissions.
Useful checks before replacing parts
- Compare commanded and actual fuel pressure while watching regulator command, pump control, and pressure sensor data.
- Check for a stuck regulator, restricted return path where applicable, sensor bias, wiring faults, or incorrect pump control.
- Review rich fuel trims, hard starts, black smoke, or fuel odor that can appear when pressure is truly high.
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.