P0057

Описание

Heater Oxygen Sensor-2 Bank 2, Short to Ground

Частые симптомы

• Slow bank 2 downstream O2 sensor activation
• Delayed bank 2 catalyst efficiency checks
• Check Engine Light
• Possible bank 2 P0420 catalyst codes
• Extended bank 2 emission system readiness

Возможные причины

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

Диагностика

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

Решения по ремонту

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

Профилактика

• Maintain bank 2 downstream sensor wiring integrity
• Protect bank 2 downstream wiring from road debris
• Regular bank 2 emission system checks