What it means
The control module detects a low condition in the cylinder 10 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 cylinder 10 injector circuit carries the control module’s command to meter fuel into cylinder 10. The module monitors the circuit’s electrical response and sets this code when it detects a low condition, indicating an electrical circuit problem rather than establishing that the injector is restricted.
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
- Save the freeze-frame data and check live data for cylinder 10 misfire or injector circuit indications to see when the fault occurs.
- With the engine off, inspect the cylinder 10 injector connector and nearby harness for corrosion, loose or backed-out pins, damaged insulation, or chafing against ground.
- Check the cylinder 10 injector circuit for a short to ground using the manufacturer's wiring diagram and test procedure.
- Test circuit continuity and connector contact quality between the cylinder 10 injector and control module, comparing results with the manufacturer's specification.
- If wiring and connectors pass, test the cylinder 10 injector and its control circuit according to the manufacturer's procedure before considering a module fault.
Common fixes
- Repair chafed cylinder 10 injector wiring and insulate or secure it away from the grounding point.
- Clean or replace corroded cylinder 10 injector connector terminals and ensure the pins are seated correctly.
- Repair an open or damaged section of the cylinder 10 injector circuit.
- Replace the cylinder 10 injector if testing confirms an electrical fault within it.
Can I keep driving?
If the engine runs smoothly and the warning light is steady, limit driving and arrange diagnosis soon; cylinder 10 may misfire and increase emissions and fuel use. Avoid hard acceleration, and stop driving if the light flashes, power drops sharply, or the engine runs very roughly.
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.