Injector Circuit / Open - Cylinder 6
What does P0206 mean?
The P0206 code means the vehicle's onboard diagnostic system has detected: Injector Circuit / Open - Cylinder 6. This is a critical severity code.
Common Symptoms
- Check Engine Light on or flashing
- Cylinder 6 misfire and rough idle
- Noticeable loss of power
- Strong fuel smell if injector is stuck open
- Engine vibration and rough running
Probable Causes (Ranked by Likelihood)
- Failed fuel injector on cylinder 6 Very High
- Open or broken wire in the injector circuit High
- Corroded or damaged injector connector Moderate
- PCM injector driver failure Low
- High resistance in injector coil Low
Step-by-Step Diagnostic Procedure
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Use a scan tool to confirm cylinder 6 misfire. Check for companion codes P0306 (cylinder 6 misfire).
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Measure fuel injector resistance on cylinder 6 (typically 11-17 ohms for high-impedance injectors). Out of range or infinite resistance indicates a failed injector.
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Check for 12V power and PCM ground signal at the injector connector using a noid light or test light. No pulse indicates a circuit issue.
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Swap the cylinder 6 injector with an adjacent cylinder. If the fault moves, the injector is bad. If it stays, the wiring or PCM driver is the issue.
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Inspect the wiring harness to cylinder 6 for damage, chafing, or breaks. Check the connector for corrosion or pushed-out pins.
Frequently Asked Questions
Can I drive with code P0206?
No. A dead cylinder 6 injector means unburned fuel enters the exhaust, which can overheat and destroy the catalytic converter. If the Check Engine Light is flashing, stop driving immediately.
How do I find cylinder 6?
Cylinder numbering varies by manufacturer. On V6 engines, cylinder 6 is typically the rear cylinder on bank 2. On V8 engines, check your service manual as numbering differs between Ford, GM, and Chrysler.
Can I swap injectors to diagnose P0206?
Yes, swapping the cylinder 6 injector with another cylinder is an excellent diagnostic technique. If the code changes to the new cylinder location, the injector is confirmed faulty.