OBD Codes List

Diagnostic reference · P2147

P2147

Fuel Injector Group A Supply Voltage Circuit Low

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

What it means

P2147 means Fuel Injector Group A Supply Voltage Circuit Low.

Where it lives

For P2147, the circuit described runs through the injector. The description of P2147 reports a fault at the injector.

Check these first

  • Low supply voltage to the fuel injector group A
  • A short to ground in the group A injector circuit
  • An open in the group A injector circuit
  • Corrosion at the group A injector connectors
  • A failed fuel injector driver

What to do next

  1. Read the group A injector supply voltage on a scan tool
  2. Test the group A injector circuit for a short to ground
  3. Check the group A injector connectors for corrosion
  4. Measure the resistance of the group A injectors
  5. Replace the group A injector or the driver if found faulty
  6. Clear the code and retest

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Updated

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