Injector Circuit Malfunction - Cylinder 12
The P0212 code indicates a malfunction in the injector circuit for cylinder 12. This means the Engine Control Module (ECM) has detected an electrical issue, such as an open or short circuit, in the wiring or connector of the fuel injector for cylinder 12. This can cause the injector to not fire properly, leading to misfires, poor fuel economy, and potential engine damage if left unaddressed.
01. Most Common Causes
- Faulty fuel injector on cylinder 12
- Open or short circuit in injector wiring or connector
- Damaged ECM or injector driver circuit
- Corrosion or loose connection at injector harness
02. Symptoms You Will Notice
- Engine misfire or rough idle
- Check Engine Light illuminated
- Decreased fuel economy
- Loss of power or hesitation during acceleration
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for additional codes.
Step 2: Visually inspect the injector wiring and connector for cylinder 12 for damage, corrosion, or loose connections.
Step 3: Measure resistance of the injector on cylinder 12; compare to manufacturer specs (typically 12-16 ohms).
Step 4: Check for voltage and ground at the injector connector with the engine running; if missing, trace circuit back to ECM.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause misfires, catalytic converter damage, and reduced fuel economy. Have it diagnosed promptly.
How much does it cost to fix?▼
Diagnosis typically costs $50-$150. Repair costs vary: injector replacement $200-$400, wiring repair $100-$300, ECM replacement $500-$1000.