Fuel Injector Control Circuit Open
There's an open circuit in the fuel injector control system.
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 can't send the proper signals to the fuel injectors because something is broken in the wires or the connectors, preventing fuel delivery to the engine.
What the computer is actually seeing
The engine control module (ECM) expects to see a certain voltage or resistance from the fuel injector circuit, typically around 0.5-1.5 ohms when closed. If the circuit is open, it'll read infinite resistance, leading to this fault code.
What a healthy reading looks like
Fuel injector resistance should be between 1.0 and 3.0 ohms. Signal voltage should be around 12V when activated and near 0V when deactivated.
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 for any visible damage to the wiring harness connected to the fuel injectors.
- 22. Inspect the connectors for corrosion, looseness, or damage. Repair as necessary.
- 33. Measure the resistance of the fuel injector with a multimeter; it should be between 1.0 and 3.0 ohms.
- 4 - If resistance is out of specification, replace the injector.
- 54. Use a scan tool to check for other related codes or performance issues. If other codes are present, address those first.
- 65. Check signal voltage at the injector connector while cranking the engine; it should show around 12V when the injector is active.
- 7 - If voltage is absent even after passing prior tests, inspect further back to the ECM.
Common causes
- Open circuit in the wiring harness
- Corroded or damaged connectors
- Faulty fuel injector
- Failed ECM (Engine Control Module)
Typical repair cost
$$ - $$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Not advisable; driving can lead to performance issues and potential engine damage due to lack of fuel.
Will this code come back after repair?
If repaired properly, it shouldn't come back. Ensure all connections and wiring are solid.
Why does this code pair with others like SPN 2659?
Related codes may indicate systemic issues within the fuel system or ECM failures.
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