Fuel Pump A Control Circuit High

Where it lives

For P0629, the pump sits on the circuit this code reports. The description of P0629 reports a fault at the pump.

Check these first

• A short to voltage on the fuel pump control wire
• A failed fuel pump relay or control module
• Corrosion in the pump control circuit
• A failed fuel pump motor
• A faulty ECM driver

What to do next

1. Check the fuel pump fuse and relay
2. Inspect the pump control wire for a short to voltage
3. Measure the control circuit voltage with the key on
4. Test the fuel pump current draw
5. Repair the short if the control wire reads high
6. Clear the code and retest

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