Fuel Pressure Regulator 1 Performance
The ECU detects that fuel rail pressure does not respond to commanded changes of the pressure regulator within expected dynamics. Indicates a sluggish or partially failed regulator.
Affected components
- Fuel pressure regulator
- Fuel rail
- High pressure fuel pump
Common causes
- High likelihood: Regulator sluggish or partially blocked
- Medium likelihood: Fuel contamination
Possible symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.