Fuel Pressure Regulator D Control Circuit Low
Voltage on the fuel pressure regulator D control line is below the expected window. Wire shorted to ground or coil short.
Affected components
- Fuel pressure regulator d
- Wiring harness
- Fuel rail
Common causes
- High likelihood: Control wire shorted to ground
- Medium likelihood: Internal short in regulator coil
- 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
- 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.