What it means
The control module detected a high electrical signal in the cylinder 11 injector B circuit. This indicates an electrical circuit condition; it does not by itself establish injector flow or cylinder fuel balance.
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 signal in the injector B circuit for cylinder 11. This code sets when that signal is higher than expected, which can point to wiring shorted to voltage, a connector problem, or an injector electrical fault; it does not confirm a fuel-flow problem.
Common causes
Most likely first.
- Short to voltage in wiring
- Damaged or corroded connector
- Injector electrical fault
Symptoms
- Check-engine light on
- Rough running or misfire
- Reduced engine power
- Increased fuel consumption
How to diagnose it
- Save the freeze-frame data and check for related injector or misfire codes to see when the cylinder 11 circuit fault occurred.
- Inspect the cylinder 11 injector B connector and nearby harness for corrosion, loose pins, damaged insulation, or contact with a power source.
- Compare injector B circuit live data or commanded status with the manufacturer's diagnostic information to confirm the high-signal condition.
- With the circuit safely isolated as specified by the manufacturer, check the wiring for a short to voltage and inspect connector pin fit.
- If the wiring and connector pass, test the cylinder 11 injector B electrical characteristics against the manufacturer's specification.
Common fixes
- Repair wiring shorted to voltage in the cylinder 11 injector B circuit.
- Clean or repair corroded, loose, or damaged injector B connector terminals.
- Replace the cylinder 11 injector B if its electrical test confirms an internal fault.
Can I keep driving?
If the engine runs smoothly, limit driving to short, gentle trips and avoid heavy acceleration. A misfire or rough running can damage the catalytic converter, so stop driving if it becomes severe or the warning light flashes.
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.