Injector Circuit/Open – Cylinder 5
There's a problem with the fuel injector circuit for cylinder 5.
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 fuel injector for cylinder 5 isn't working right, which means that cylinder isn't getting the fuel it needs to operate properly.
What the computer is actually seeing
The engine control module (ECM) monitors the voltage and resistance in the injector circuit. If it doesn't see the expected voltage drop (typically around 12V when the injector is active) or detects constant high resistance (greater than 5 ohms), it triggers this code.
What a healthy reading looks like
The injector circuit should show around 12V when active; resistance should be between 1.0 to 5.0 ohms.
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.
- 1Check wiring and connectors for cylinder 5 injector for damage or corrosion. If found, repair or replace as needed.
- 2Measure the voltage at the injector connector while cranking the engine. Expect around 12V. If not, check the power supply to the injector and the fuse associated with it.
- 3Check resistance of the injector itself. It should be between 1.0 to 5.0 ohms. If outside of this range, replace the injector.
- 4If voltage and resistance are normal, check the ECM for proper operation and possible fault codes that might indicate ECM needs reprogramming or replacing.
Common causes
- Faulty fuel injector
- Wiring issues in the injector circuit
- Bad connectors or corroded terminals
- ECM issues
- Open circuit in the wiring harness
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive my vehicle with this code?
It's not recommended, as the engine will run rough and can lead to further engine damage over time.
Will this code come back after clearing it?
If the underlying issue isn't resolved, yes, the code will likely return.
Why is this code paired with others?
Multi-cylinder misfire codes often appear together due to shared problems in the fuel system, wiring, or ECM issues.
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