P1643 – Fuel Level Sensor Range/Performance
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
- Incorrect fuel gauge
- Warning light
Causes
- Faulty sensor
- Wiring issue
- Float mechanism jam
Diagnosis
- Read sensor data
- Inspect wiring
- Check tank float
Repair
- Replace sensor
- Repair wiring
- Fix float mechanism