P1628 – Knock Sensor Circuit Fault
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 acceleration
Causes
- Damaged wiring
- Faulty sensor
- Connector corrosion
Diagnosis
- Inspect wiring
- Test sensor
- Check connector
Repair
- Repair wiring
- Replace sensor
- Clean connector