FUEL INJECTOR 2 CIRCUIT LOW
The engine control unit detected a low voltage or current on the fuel injector circuit for cylinder 2.
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What it means (plain English)
Inside the engine control unit (ECU), it monitors the voltage sent to the fuel injector for cylinder 2. If the voltage goes below 5 volts when the injector should be active, the ECU sees this as a problem and sets this fault code.
What the computer is actually seeing
The ECU expects to see the fuel injector circuit voltage between 10-14 volts while the engine is running and the injector is activated. It continuously monitors the current draw and expects it to be around 1-2 amps during operation.
What a healthy reading looks like
Fuel injector circuit voltage should be between 10-14 volts; current draw around 1-2 amps.
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 connectors for the fuel injector. Look for frayed wires or corrosion. If damaged, repair or replace as needed.
- 22. Measure the voltage at the injector connector with the engine on. It should be between 10-14 volts. If not, proceed to the next step.
- 33. Test the injector for proper function by checking the resistance with an ohmmeter. It should typically be around 12-16 ohms. If not, replace the injector.
- 44. If the voltage at the connector is fine, check ground consistency at the injector. A weak ground can cause low voltage issues. Repair as needed.
- 55. If all checks are okay but code persists, consider testing the ECU for faults.
Common causes
- Damaged or corroded wiring in the injector circuit
- Faulty fuel injector
- Bad ECU
- Poor ground connection for the fuel injector
Typical repair cost
$$$ (200-600)
Related codes
Frequently asked questions
Can I drive with this code active?
You can drive it, but expect performance issues and potential fuel economy loss. It's best to fix it soon.
Will this code come back after I clear it?
If the underlying issue is not resolved, the code will likely return after clearing it.
Why does this code appear with others?
Other codes can indicate problems with the fuel system or related components, like bad sensors or wiring issues.
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