Cylinder 11 Injector Circuit Low

Possible causes

• CommonFailed injector - open or shorted winding
• CommonCorroded or damaged connector at the injector
• CommonChafed or heat-damaged wiring in the injector harness
• PossibleBlown fuse or failed relay on the injector supply
• PossibleOil or fuel in the connector from a leaking seal
• RareFailed control module driver

What you might notice

• Misfire - the engine shaking, especially at idle
• Loss of power and hesitation
• Hard starting or no start
• Smell of unburnt fuel
• Check engine light on, or flashing

What to check, in order

1. Disconnect the cylinder 11 injector and check whether the low reading persists at the harness. If it does, the fault is in the wiring rather than the injector.
2. Read all codes. A misfire code for the same cylinder alongside this one confirms which cylinder is not firing.
3. Measure the injector winding resistance and compare it with a known-good injector on the same engine. Comparing against its neighbours is often more useful than a specification.
4. Swap the connector - not the injector - with a neighbouring cylinder and see whether the fault follows. If it does, the fault is in the injector; if it stays, it is in the wiring.
5. Inspect the connector for corrosion, and for oil or fuel that has crept in through a failed seal.
6. Check the injector harness for chafe and heat damage. It sits directly on top of a hot engine and gets disturbed at every service.