What it means
Injection timing performance for cylinder 11 is more advanced than the expected range.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The engine control module monitors the timing response of the cylinder 11 injector against the commanded injection event. This code sets when cylinder 11's injection is detected earlier than the allowed range, which can result from injector behavior, its electrical control, or fuel delivery.
Common causes
Most likely first.
- Injector wear, sticking, or restricted flow
- Fault in cylinder 11 injector wiring or connector
- Injector driver or control circuit fault
- Fuel pressure or delivery problem affecting injector response
Symptoms
- Check engine light on
- Rough idle or vibration
- Reduced power or uneven acceleration
- Increased fuel consumption
How to diagnose it
- Record freeze-frame data and review cylinder 11 injector or timing readings to determine when the event went over advanced.
- Inspect the cylinder 11 injector connector and harness for corrosion, loose pins, chafing, heat damage, or leakage.
- Use available scan-tool contribution or injector tests to compare cylinder 11 with the other cylinders.
- Check the cylinder 11 injector wiring and control signals for opens, shorts, or poor connections using the manufacturer's procedure.
- If the electrical checks pass, assess injector condition and fuel pressure or delivery against the manufacturer's specification.
Common fixes
- Repair a loose or damaged cylinder 11 injector connection or wiring.
- Correct a fuel delivery problem if it fails the manufacturer's specification.
- Clean or replace a sticking or restricted cylinder 11 injector.
- Repair the injector driver or control circuit if testing verifies a fault.
Can I keep driving?
If the engine runs smoothly and the warning light is steady, restrict driving and avoid heavy loads until diagnosed. Stop if it misfires, runs roughly, or loses power, since continued incorrect fueling can damage emissions equipment.
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.