Fuel Injector Circuit Malfunction Cylinder 6 (Ford)
What does P1206 mean?
The P1206 code means the vehicle's onboard diagnostic system has detected: Fuel Injector Circuit Malfunction Cylinder 6 (Ford). This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Cylinder 6 misfire
- Rough idle and vibration
- Reduced power
- Poor fuel economy
Probable Causes (Ranked by Likelihood)
- Faulty cylinder 6 fuel injector Very High
- Open or short in cylinder 6 injector wiring High
- Corroded connector at cylinder 6 injector Moderate
- PCM driver circuit failure Moderate
- Harness damage near cylinder 6 Low
Step-by-Step Diagnostic Procedure
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Measure cylinder 6 injector coil resistance
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Inspect the connector for damage and corrosion
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Verify injector pulse with a noid light
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Swap the injector to another cylinder to confirm failure
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Check wiring from PCM to cylinder 6 for continuity
Frequently Asked Questions
Is cylinder 6 hard to access?
On Ford V6 engines, cylinder 6 is typically at the rear of the engine and can be difficult to access, especially on front-wheel drive vehicles. On V8 trucks, it is the second cylinder on the driver side and more accessible.
Can corrosion cause intermittent injector faults?
Yes. Corrosion on the injector connector can cause intermittent electrical contact that comes and goes. This leads to intermittent misfires that may be hard to reproduce. Always clean or replace corroded connectors.
Should I replace all injectors on a high-mileage vehicle?
If one injector has failed on a vehicle with over 150,000 miles, the other injectors are likely near the end of their life too. Replacing all injectors ensures balanced fuel delivery and prevents repeat visits for the same issue.