OBD Codes List

Diagnostic reference · P0A74

P0A74

Generator Phase V Current High

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

What it means

P0A74 means Generator Phase V Current High.

Check these first

  • A short circuit in the V phase winding of the hybrid generator
  • A short to ground in the generator V phase cable
  • A failed current sensor on the generator V phase
  • Insulation breakdown inside the generator
  • A stuck inverter transistor driving the generator V phase

What to do next

  1. Inspect the generator V phase cable and connectors
  2. Test the generator V phase winding to ground
  3. Compare V phase current with the other generator phases
  4. Check the generator for overheating or burnt windings
  5. Replace the inverter if the V phase transistor is shorted
  6. Clear the code and retest

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Updated

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