P0212 Code: Cylinder 12 Injector Circuit Malfunction
🟠 Moderate severity · drivable
Yes, but cylinder 12 may misfire and the engine will run rough. Fix it soon to avoid converter damage.
What P0212 means
The fuel injector circuit for cylinder 12 has an electrical fault, so the computer can't control that injector properly. Cylinder 12 may not get the fuel it needs, which causes a misfire and rough running. This usually points to the injector itself or its wiring.
Symptoms
- Check engine light on (may flash)
- Rough idle or misfire
- Loss of power
- Poor fuel economy
Common causes
- most common: Faulty fuel injector on cylinder 12
- common: Damaged wiring or loose connector at the injector
- less common: Injector driver fault in the engine computer
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Inspect and clean the cylinder 12 injector connector | Yes | $0–10 |
| Replace the cylinder 12 fuel injector | Mechanic | $80–300 |
| Repair damaged injector wiring | Mechanic | $50–150 |
Frequently asked questions
Can I drive with a P0212 code?
Yes, but cylinder 12 may misfire and the engine will run rough. Fix it soon to avoid damaging the catalytic converter.
What is the most common cause of P0212?
A faulty fuel injector or a wiring/connector problem at the cylinder 12 injector.
How much does it cost to fix a P0212?
A new injector is typically $80–300, and a wiring repair is usually $50–150.
Related codes
P0200
P0200 Code: Injector Circuit Malfunction
P0211P0211 Code: Cylinder 11 Injector Circuit Malfunction
P0312P0312 Code: Cylinder 12 Misfire Detected
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.