Injector Circuit Malfunction (Cylinder 3)
There's an issue with the injector circuit for cylinder 3.
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 car's computer thinks the fuel injector for cylinder 3 isn't working right. This could mean it's not getting power, or it's failed entirely.
What the computer is actually seeing
The engine control module (ECM) monitors voltage and resistance changes in the fuel injector circuit for cylinder 3. If voltage stays low (<5V) when it should be around 12V while the engine is cranking, it triggers the code.
What a healthy reading looks like
Normal injector voltage should be around 12V and resistance across the injector terminals should be between 12 and 16 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.
- 11. Inspect wiring and connectors for cylinder 3 injector. Look for damage, loose connections, or corrosion.
- 22. Measure the voltage at the injector connector while cranking the engine. Expect around 12V; if less than 5V, go to step 3. If 12V is present, test the injector resistance.
- 33. Check the resistance of the injector; it should be between 12 and 16 ohms. If it's out of spec, replace the injector. If it's good, continue to step 4.
- 44. Inspect the ECM and its connections. If the connections are secure and in good condition, suspect the ECM. Test or replace if necessary.
Common causes
- Open or shorted wiring in the injector circuit for cylinder 3
- Faulty fuel injector (shorted or open circuit)
- Failed engine control module (rare)
- Poor connection at harness or connectors
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderately, but it's best to fix it soon as it can cause further engine issues and reduced performance.
Will this code come back after clearing?
It may if the underlying issue isn't resolved, such as a bad injector or wiring issue.
Why does this code appear with other injector codes?
These codes can often occur together if there are multiple injector circuit problems or a common wiring fault.
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