Electric/Auxiliary Transmission Fluid Pump A Motor Supply Voltage Circuit Low

Where it lives

For P0B0A, the pump sits on the circuit this code reports. The description of P0B0A reports a fault at the pump.

Check these first

• Low battery voltage feeding the pump A supply circuit
• Corroded pump A supply wiring
• A failed auxiliary transmission fluid pump motor
• A short or open in the pump A supply circuit

What to do next

1. Read the transmission fluid pump A supply voltage on a scan tool
2. Check the battery voltage and charge the battery
3. Check the pump A supply circuit for a short or open
4. Inspect the pump A supply wiring for corrosion
5. Replace the pump motor if the supply circuit tests good
6. Clear the code and retest

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