Vacuum Pump Control Circuit B Low

Where it lives

For P25F0, the pump sits on the circuit this code reports. The description of P25F0 reports a fault at the pump.

Check these first

• A short to ground in the vacuum pump control circuit B
• A failed vacuum pump motor pulling the control low
• Chafed wiring contacting ground
• A corroded pump connector

What to do next

1. Inspect the circuit B wiring for a short to ground
2. Disconnect the pump and recheck the control signal
3. Measure the pump motor current draw
4. Check the connector for corrosion and pushed pins
5. Replace the pump if the wiring tests good
6. Clear the code and retest

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