Fuel Pump A Control Circuit Range or Performance
The control output to the primary fuel pump A is electrically intact yet response and fuel pressure response do not match - typically a worn pump, a clogged strainer, or a partially shorted PWM driver.
Affected components
- Fuel pump a
- Fuel pump control module
Common causes
- High likelihood: Fuel pump worn
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
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.