Measured fuel pressure is above the target. The driver may notice rough running, a hard start or black smoke.
Likely causes, most common first
- Faulty pressure regulator or control valve
- Faulty fuel pressure sensor
- Blocked fuel return line
- Faulty high pressure pump
Parts usually involved
- Pressure regulator
- Fuel pressure sensor
- High pressure pump
Test before you replace
Compare sensor pressure with a mechanical gauge where possible and test the regulator control.
General guidance for generic OBD2 codes. Always follow the maker's procedure for the car in front of you.