Injector Circuit / Open - Cylinder 7
The P0207 code means the vehicle's onboard diagnostic system has detected: Injector Circuit / Open - Cylinder 7. This is a critical severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- moderate
- Estimated cost
- $100 - $400 (fuel injector $50-$200; wiring repair $50-$100; labor $50-$200)
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Common Symptoms
- Check Engine Light on or flashing
- Cylinder 7 misfire with rough running
- Significant loss of power
- Engine vibration
- Strong fuel smell if injector is stuck open
Probable Causes (Ranked by Likelihood)
- Failed fuel injector on cylinder 7 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
-
Confirm cylinder 7 misfire with a scan tool. Check for companion code P0307.
-
Measure cylinder 7 fuel injector resistance (11-17 ohms typical for high-impedance). Infinite or very high resistance means the injector is open.
-
Test for pulse signal at the injector connector using a noid light while cranking.
-
Swap the cylinder 7 injector with another cylinder to see if the fault follows the injector.
-
Inspect the wiring harness and connector for breaks, chafing, or corrosion.
Frequently Asked Questions
Can I drive with code P0207?
No. Running with a dead cylinder 7 sends unburned fuel into the catalytic converter, which can cause it to overheat and fail. If the Check Engine Light is flashing, do not drive.
Is cylinder 7 only on V8 engines?
Typically yes. Cylinder 7 exists on V8 and larger engines. If you have a V6 or inline-4 and see P0207, verify the code with a different scan tool as it may be a read error.
How much does an injector replacement cost?
A single fuel injector costs $50 to $200 depending on the vehicle. Labor ranges from $50 to $200. On some V8 engines, accessing cylinder 7 requires removing the intake manifold, which increases labor time.
Sources
This page is built from documented references. Verify against your own service info before repair work.
P0207 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
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