Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit Intermittent/Erratic
The control circuit of the alternative fuel hydraulic fuel pump select valve reports a control circuit intermittent/erratic condition. Pump path selection cannot be commanded reliably.
Affected components
- Alt fuel hyd pump select valve
- Wiring harness
- Afcm
Common causes
- High likelihood: Valve connector not seated
- Medium likelihood: Harness chafing intermittently shorts the wire
- Low likelihood: Connector with intermittent contact under vibration
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
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.