P0040
O2 Bank 1 Sensor 1 Signals Swapped with O2 Bank 2 Sensor 1
Oxygen SensorsMODERATE
Описание
O2 Bank-1 Sensor-1 Signals Swapped w/ O2 Bank-2 Sensor-1
Частые симптомы
- Incorrect fuel trim readings
- Check Engine Light
- Possible rich/lean conditions on wrong bank
- Erratic fuel control
- Cross-bank fuel trim issues
Возможные причины
- O2 sensor wiring harnesses crossed between banks
- Incorrect sensor installation after service
- Manufacturing wiring error
- Harness damage causing cross-connection
- ECU bank identification confusion
Диагностика
- 1. Check O2 sensor wiring routing between banks
- 2. Verify sensor installation locations
- 3. Test individual O2 sensor signals
- 4. Check for wiring harness damage or modifications
- 5. Monitor bank-specific fuel trims
Решения по ремонту
- Correct crossed O2 sensor wiring
- Reinstall sensors in correct locations
- Repair damaged wiring harness
- Replace modified or incorrect harness
- Reset fuel trim adaptations
Профилактика
- Label sensors during removal
- Follow wiring diagrams during repairs
- Verify sensor locations after service