Electric/Auxiliary Transmission Fluid Pump Motor Phase U Current

Where it lives

For P0B00, the description names the pump as the part involved.

Check these first

• An open or short in the pump motor U phase wiring
• A failed auxiliary transmission fluid pump motor
• Corrosion or damage at the pump motor connectors
• Low battery voltage to the pump
• A faulty pump motor control module

What to do next

1. Inspect the pump motor U phase wiring and connectors
2. Measure U phase winding resistance and compare across phases
3. Check battery voltage at the pump
4. Compare U phase current with V and W on live data
5. Replace the auxiliary transmission fluid pump motor if the U phase is faulty
6. Clear the code and retest

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