Electric/Auxiliary Transmission Fluid Pump Motor Phase W Current High

Where it lives

For P0B08, the part to look at first is the pump named here.

Check these first

• A short in the phase W wiring
• High resistance in the phase W windings
• Worn pump motor bearings
• Contaminated transmission fluid making the pump work harder

What to do next

1. Read the transmission fluid pump phase W current on a scan tool
2. Check the phase W wiring for a short
3. Measure the phase W winding resistance
4. Check the pump motor for binding or worn bearings
5. Replace the pump motor if the windings test good
6. Clear the code and retest

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