Electric/Auxiliary Transmission Fluid Pump A Motor Current High

Where it lives

For P0C28, start at the pump the description names.

Check these first

• An electronic transmission fluid auxiliary pump pulling more current than normal
• A short in the electronic transmission fluid auxiliary pump circuit
• A failed electronic transmission fluid auxiliary pump
• An open or short in the electronic transmission fluid auxiliary pump harness

What to do next

1. Command the electronic transmission fluid auxiliary pump on with a scan tool
2. Read the electronic transmission fluid auxiliary pump current draw
3. Inspect the electronic transmission fluid auxiliary pump connector and wiring
4. Test the electronic transmission fluid auxiliary pump circuit for open and short faults
5. Replace the electronic transmission fluid auxiliary pump if current stays high
6. Clear the code and retest

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