P0036

Описание

Heater Oxygen Sensor-2 Bank-1, Circuit Malfunction

Частые симптомы

• Delayed catalyst efficiency monitoring
• Check Engine Light
• Possible catalyst efficiency codes
• Extended warm-up for emission tests
• Reduced emission system performance

Возможные причины

• Failed downstream O2 sensor heating element
• Open circuit in downstream heater wiring
• Blown O2 sensor heater fuse
• Corroded downstream electrical connectors
• ECU downstream heater control fault

Диагностика

1. 1. Check downstream O2 sensor heater fuse
2. 2. Test continuity in downstream heater circuit
3. 3. Measure downstream heater element resistance
4. 4. Check voltage at downstream O2 sensor
5. 5. Inspect downstream wiring and connectors

Решения по ремонту

• Replace faulty downstream oxygen sensor
• Repair open downstream heater wiring
• Replace blown fuse
• Clean corroded downstream connectors
• Replace ECU if heater control failed

Профилактика

• Regular downstream O2 sensor maintenance
• Protect downstream wiring from exhaust heat
• Use OEM quality downstream sensors