What it means
The control module detects a high 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 high condition, which can result from a short to battery voltage and does not by itself prove an injector flow fault.
Common causes
Most likely first.
- Wiring shorted to battery
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
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 identify the conditions when the high reading occurs.
- With the engine off, inspect the cylinder 10 injector connector and harness for corrosion, loose or backed-out pins, damaged insulation, or a supply wire pinched against a B+ source.
- Using the manufacturer's wiring diagram, check whether the cylinder 10 injector control wire is shorted to battery voltage.
- Test the circuit and connector continuity and isolation from power sources according to the manufacturer's procedure.
- If the wiring passes, test the cylinder 10 injector and control-module driver using the manufacturer's procedure before considering module replacement.
Common fixes
- Repair or reroute cylinder 10 injector wiring that is pinched against a battery supply.
- Clean or replace corroded cylinder 10 injector connector terminals and secure any backed-out pins.
- Repair damaged insulation or a section of wire shorted to battery voltage.
- Replace the cylinder 10 injector if its electrical fault is confirmed by testing.
Can I keep driving?
If the engine runs smoothly and the warning light is steady, drive only as needed for prompt diagnosis; a cylinder 10 circuit fault can cause a misfire, reduced power, and excess emissions. Avoid heavy acceleration, and stop if the light flashes or the engine begins running 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.