Fuel Injector 2 Control Circuit High (GM)
What does P1214 mean?
The P1214 code means the vehicle's onboard diagnostic system has detected: Fuel Injector 2 Control Circuit High (GM). This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Cylinder 2 misfire
- Rough idle and vibration
- Reduced engine power
- Poor fuel economy
Probable Causes (Ranked by Likelihood)
- Internal short in cylinder 2 fuel injector Very High
- Short to power in injector 2 wiring High
- Corroded connector at injector 2 Moderate
- Wiring harness damage near cylinder 2 Moderate
- PCM driver fault for injector 2 Low
Step-by-Step Diagnostic Procedure
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Measure cylinder 2 injector resistance
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Check for short to power in the injector 2 control wire
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Inspect the connector for corrosion or physical damage
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Swap the cylinder 2 injector with another to isolate the fault
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Inspect wiring harness for chafing or damaged insulation
Frequently Asked Questions
Can I swap GM injectors between cylinders as a test?
Yes. Swapping is an effective diagnostic technique on GM engines. If the high circuit code follows the injector to its new cylinder, the injector is at fault. If the code stays on cylinder 2, the wiring is the problem.
What is normal injector resistance for a GM engine?
Most GM port fuel injectors have a resistance of 11 to 16 ohms. GDI (direct injection) injectors may have different specifications. Always check the service manual for your specific engine.
How long does it take to replace one injector?
On most GM engines, a single injector replacement takes 1 to 2 hours. The fuel rail may need to be partially removed. Direct injection injectors on newer engines may take longer due to the high-pressure fuel system.