Alternative Fuel Hydraulic Fuel Pump Select Valve Control Range/Performance

Where it lives

For P2A71, start at the pump the description names.

Check these first

• An alternative fuel hydraulic pump select valve moving outside its commanded range
• A sticking hydraulic pump select valve
• High resistance in the select valve control circuit
• Contaminated alternative fuel hydraulic fluid
• A failed select valve solenoid

What to do next

1. Read hydraulic pump select valve position on a scan tool
2. Command the select valve through its range
3. Test the select valve control circuit for added resistance
4. Check alternative fuel hydraulic fluid condition
5. Replace the hydraulic pump select valve if travel stays outside range
6. Clear the code and retest

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