OBD Codes List

Diagnostic reference · P0B06

P0B06

Electric/Auxiliary Transmission Fluid Pump Motor Phase W Current

System
Powertrain control (P code)
Lamp
Check Engine Light
Category
Powertrain - Hybrid Propulsion

What it means

P0B06 means Electric/Auxiliary Transmission Fluid Pump Motor Phase W Current.

Where it lives

For P0B06, the part to look at first is the pump named here.

Check these first

  • A short or open in the phase W wiring harness
  • Corroded phase W pump motor connectors
  • A failed auxiliary transmission fluid pump motor
  • Low battery voltage at the pump motor

What to do next

  1. Read the transmission fluid pump phase W current on a scan tool
  2. Check the phase W harness for a short or open
  3. Measure the phase W winding resistance
  4. Check the battery voltage
  5. Replace the pump motor if the circuit tests good
  6. Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.