Fuel Pump A Low Flow / Performance
The ECU detects insufficient fuel flow from fuel pump A. Either the pump is worn out, the supply line is restricted, or the pressure regulator does not allow proper flow.
Affected components
- Fuel pump
- Fuel filter
- Fuel pressure regulator
Common causes
- High likelihood: Worn fuel pump
- Medium likelihood: Clogged fuel filter
- Low likelihood: Pressure regulator fault
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
- Reduced-power or limp mode may occur
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.