Fuel Pressure Regulator 2 Control Circuit High
Drive voltage to the second fuel pressure regulator solenoid is above the upper limit — short to supply or open ground side. The driver protection trips, regulator falls back to default.
Affected components
- Fuel pressure regulator 2
- Fuel pressure regulator wiring
Common causes
- High likelihood: Drive line shorted to supply
- Low likelihood: ECU driver stage failed
- Low likelihood: Connector pins corroded - high contact resistance
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
Related codes
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.