P0201 – Injector Circuit Malfunction (Cylinder 1)
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Symptoms
- Rough idle
- Hesitation
- Poor acceleration
- Engine shaking
- Check engine light
Causes
- Faulty injector
- Wiring issue
- ECU driver fault
- Low fuel pressure
- Connector issue
Diagnosis
- Check injector pulse
- Inspect wiring
- Test injector resistance
- Check fuel pressure
- Scan live data
Repair
- Replace injector
- Repair wiring
- Fix connector
- Repair ECU driver
- Check fuel pressure