OBD Codes List

Diagnostic reference · P0BF1

P0BF1

Drive Motor B Phase U Current Sensor Circuit

System
Powertrain control (P code)
Lamp
Check Engine Light
Category
Powertrain - Fuel/Air Metering

What it means

P0BF1 means Drive Motor B Phase U Current Sensor Circuit.

Where it lives

For P0BF1, the sensor sits on the circuit this code reports. The description of P0BF1 reports a fault at the sensor.

Check these first

  • A failed drive motor B phase U current sensor
  • An open or short in the phase U sensor wiring
  • Corrosion or water in the phase U sensor connector
  • A motor control module fault misreading phase U

What to do next

  1. Read drive motor B phase U current on a scan tool
  2. Inspect the phase U sensor and its connector
  3. Test the phase U sensor circuit for an open or short
  4. Measure the phase U current sensor output against spec
  5. Replace the phase U current sensor 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.