Injector Circuit/Open - Cylinder 7
This code indicates a problem with the fuel injector circuit for cylinder 7.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer is not seeing proper action from the fuel injector for cylinder 7, which could mean the injector is bad or the wiring is faulty.
What the computer is actually seeing
The engine control module (ECM) monitors the voltage across the fuel injector. If the voltage is not in the expected range during multiple engine cycles, the code is triggered.
What a healthy reading looks like
Injector voltage should be around 12 volts during operation; you should see a pulsing signal at the connector when the engine is running.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the wiring and connector for cylinder 7. Look for any visible damage or corrosion.
- 22. Use a multimeter to measure the voltage at the fuel injector connector while cranking the engine. Expect around 12 volts.
- 33. If voltage is present, use a noid light to check for injector pulse while the engine is running; if absent, check ECM injector driver.
- 44. If no voltage was found, trace the wiring back to the ECM and check for continuity and shorts. Repair any issues found.
- 55. If the wiring is fine, swap the injector with another cylinder. If the code follows the injector, replace it.
Common causes
- Faulty fuel injector
- Wiring issues (broken, shorted, or corroded wires)
- Faulty connector
- ECM malfunction
- Injector driver circuit problem
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not safe to drive long distances as it could cause engine misfires or damage.
Will this code come back after the repair?
If the repair is done correctly, the code should not return.
Why does this code pair with other injector codes?
Misfires can be related to multiple injectors if there’s a common issue with wiring or the ECM.
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