Engine and gearbox (P)
P0201: Injector Circuit Cylinder 1
This code indicates a problem with the electrical circuit of the fuel injector for cylinder 1. It could be due to a fault in the injector itself or an issue with the wiring or connectors.
Checked by a licensed car technician · last reviewed 29 September 2026
Symptoms
- Engine misfire
- Rough idle
- Reduced fuel efficiency
- Check engine light on
Common causes
- Injector coil failure
- Connector corrosion
- Wiring open
- Faulty ECU
How to check it yourself
- Inspect injector connector for corrosion
- Measure injector resistance
- Check wiring for continuity
- Test ECU output
Can I keep driving?
The car can be driven, but it may run poorly and consume more fuel.
General guidance, not a professional inspection. Confirm faults with measurements before buying parts, and use a qualified mechanic for brakes, steering, fuel leaks, airbags, and other safety-critical work. Terms and disclaimer