P0212
Cylinder 12 Injector A Circuit
What it means
P0212 means Cylinder 12 Injector A Circuit.
Where it lives
For P0212, the injector sits on the circuit this code reports. The description of P0212 puts it on cylinder 12.
Check these first
- A faulty fuel injector on cylinder 12
- An open or short in the cylinder 12 injector wiring
- A faulty ECM injector driver for cylinder 12
- Low fuel pressure at the rail
- A corroded injector connector on cylinder 12
What to do next
- Read the cylinder 12 injector circuit on a scan tool
- Inspect the cylinder 12 injector wiring and connector
- Measure the injector resistance against spec
- Check the fuel pressure at the rail
- Replace the cylinder 12 injector if the coil is out of range
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.