P0042
Heater Oxygen Sensor 3 Bank 1 Control Circuit
Oxygen SensorsMODERATE
Описание
Heater Oxygen Sensor-3 Bank-1, Control Circuit
Частые симптомы
- Extended emission system warm-up
- Check Engine Light
- Possible secondary O2 sensor issues
- Delayed emission readiness
- Reduced cold emission performance
Возможные причины
- Open circuit in secondary O2 sensor heater wiring
- Failed secondary O2 sensor heating element
- Blown secondary heater fuse
- Corroded secondary electrical connectors
- ECU secondary heater control fault
Диагностика
- 1. Check secondary O2 sensor heater fuse
- 2. Test continuity in secondary heater circuit
- 3. Measure secondary heater element resistance
- 4. Check voltage at secondary O2 sensor
- 5. Inspect secondary wiring and connectors
Решения по ремонту
- Replace faulty secondary oxygen sensor
- Repair open secondary heater wiring
- Replace blown secondary fuse
- Clean corroded secondary connectors
- Replace ECU if secondary heater control failed
Профилактика
- Protect secondary O2 sensor wiring from exhaust heat
- Regular emission system electrical checks
- Use quality secondary sensors