P1609 – ECM/PCM Knock Control Error
Want to confirm the real cause of this fault code?
A high‑quality OBD2 scanner gives you live data, fuel trims, sensor readings and freeze‑frame information — exactly what you need to verify the root cause of this code with confidence.
Symptoms
- Knocking
- Poor performance
Causes
- Faulty knock sensor
- Wiring issue
- ECU fault
Diagnosis
- Read knock sensor data
- Inspect wiring
- Scan ECU
Repair
- Replace knock sensor
- Repair wiring
- Update ECU