Fuel Pump A Control Circuit High
Fuel Pump A Control Circuit High: the control-circuit voltage is above the expected range. Often an open circuit or a short to supply voltage.
Affected components
- Fuel pump
- Fuel pump relay
- Pump wiring
Common causes
- High likelihood: Pump circuit shorted to power
- Medium likelihood: Ground open
- 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.