P0051

Описание

Heater Oxygen Sensor-1 Bank 2, Signal too Low

Частые симптомы

• Slow bank 2 O2 sensor activation
• Extended closed-loop delay bank 2
• Check Engine Light
• Poor cold driveability bank 2
• Increased warm-up emissions bank 2

Возможные причины

• Short to ground in bank 2 heater circuit
• Failed bank 2 O2 sensor heating element
• Low system voltage to bank 2
• Corroded bank 2 ground connections
• ECU bank 2 driver circuit issue

Диагностика

1. 1. Check battery and charging system voltage
2. 2. Test for shorts to ground in bank 2 heater circuit
3. 3. Measure bank 2 heater element resistance
4. 4. Inspect bank 2 ground connections
5. 5. Check ECU bank 2 heater control output

Решения по ремонту

• Repair shorted bank 2 heater wiring
• Replace faulty bank 2 oxygen sensor
• Charge or replace battery if needed
• Clean and tighten bank 2 ground connections
• Replace ECU if bank 2 driver circuit failed

Профилактика

• Maintain good electrical system health
• Protect bank 2 O2 sensor wiring from abrasion
• Regular bank-specific electrical checks