Injector Circuit Malfunction — Cylinder 1
An electrical fault has been detected in the cylinder 1 injector circuit — open winding, short to ground or short to supply. This typically disables that injector to protect the driver stage in the ECU; the cylinder runs without fuel and triggers a misfire code as well.
Affected components
- Fuel injector
- Injector wiring
- Ecu injector driver
Common causes
- High likelihood: Injector winding failed open
- Medium likelihood: Wiring or connector fault
- Low likelihood: ECU injector driver damaged
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.