OBD Codes List

Diagnostic reference · P0A70

P0A70

Generator Phase U Current Low

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

What it means

P0A70 means Generator Phase U Current Low.

Check these first

  • A high voltage battery that is degraded
  • A generator that is failing
  • Wiring or connector problems between the battery, motor, and generator
  • A control module fault

What to do next

  1. Read generator phase U current on a scan tool
  2. Inspect the high voltage battery and generator
  3. Check the wiring and connectors between the battery, motor, and generator
  4. Test the control module output
  5. Replace the generator if phase U output stays low
  6. Clear the code and retest

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Updated

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