Fuel Pump B Control Circuit Low

Where it lives

For P2633, the circuit described runs through the pump. The description of P2633 reports a fault at the pump.

Check these first

• A short to ground on the fuel pump B control wire
• A failed fuel pump B
• A corroded fuel pump B connector shorting the circuit
• Chafed fuel pump B wiring

What to do next

1. Command fuel pump B on a scan tool
2. Test the fuel pump B control wire for a short to ground
3. Check fuel pump B current draw
4. Inspect the fuel pump B wiring and connector
5. Replace fuel pump B if it draws excess current
6. Clear the code and retest

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