Fuel Pressure Regulator A Solenoid Supply Voltage Control Circuit Low
Supply voltage to fuel pressure regulator A solenoid below expected range — fuse, relay or wiring fault.
Affected components
- Regulator supply
- Fuse
- Relay
Common causes
- High likelihood: Supply fuse blown or relay failed
- Low likelihood: Connector pins corroded - high contact resistance
- Low likelihood: Harness chafing through insulation
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
- Reduced-power or limp mode may occur
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.