What it means
The control module detects a low condition in the cylinder 7 injector circuit. This indicates an electrical circuit fault and does not by itself establish an injector flow problem.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The control module monitors the electrical circuit that operates the cylinder 7 fuel injector. This code sets when the circuit signal is lower than expected, which points to an electrical fault such as a short to ground; it does not prove that the injector is clogged.
Common causes
Most likely first.
- Wiring shorted to ground
- Connector pins corroded - high contact resistance
- Harness chafing through insulation
Symptoms
- Check-engine light
- Rough idle or misfire
- Reduced power
- Increased fuel consumption
How to diagnose it
- Use freeze-frame data and live misfire information to note when the fault occurs and whether cylinder 7 is affected.
- With the engine off, inspect the cylinder 7 injector connector and harness for corrosion, pushed-back pins, chafing, or contact with ground.
- Check the cylinder 7 injector circuit for a short to ground using the vehicle wiring diagram and the manufacturer's test procedure.
- Check connector continuity and terminal contact, comparing results with the manufacturer's specification.
- If the wiring and connections pass, test the injector and its control circuit before deciding whether the injector itself has failed.
Common fixes
- Repair chafed cylinder 7 injector wiring that is shorted to ground.
- Clean or repair corroded or loose connector terminals.
- Reseat a pushed-back terminal and secure the connector.
- Replace the cylinder 7 injector only if testing confirms it is faulty.
Can I keep driving?
A brief, gentle drive may be possible if the engine runs smoothly, but avoid heavy loads because a cylinder 7 misfire can damage the catalytic converter. Stop if it begins misfiring severely, stalling, or losing power.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.