Alternative Fuel Pump C Compression Stroke Valve Control Circuit Range/Performance

Where it lives

For P2A88, the description names the pump as the part involved.

Check these first

• A pump C compression stroke valve moving outside its commanded range
• A sticking pump C compression stroke valve
• High resistance in the pump C compression stroke valve control circuit
• Contaminated alternative fuel in the pump C circuit
• A failed pump C compression stroke valve solenoid

What to do next

1. Command the alternative fuel pump C compression stroke valve with a scan tool
2. Watch pump C valve travel through its full range
3. Test the pump C compression stroke valve control circuit for added resistance
4. Check alternative fuel condition at pump C
5. Replace the pump C compression stroke valve if travel stays outside range
6. Clear the code and retest

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