P2147
Fuel Injector Group A Supply Voltage Circuit Low
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
- Read the group A injector supply voltage on a scan tool
- Test the group A injector circuit for a short to ground
- Check the group A injector connectors for corrosion
- Measure the resistance of the group A injectors
- Replace the group A injector or the driver if found faulty
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.