P00B4

Описание

Radiator Coolant Temperature Sensor, Signal too High

Частые симптомы

• Abnormally high radiator coolant temperature readings
• Check Engine Light
• Possible insufficient cooling system activation
• Incorrect engine temperature protection
• Cooling system performance limitations

Возможные причины

• Short to power in radiator temperature circuit
• Failed radiator temperature sensor
• Open circuit or high resistance in sensor system
• ECU signal processing fault
• Sensor calibration error

Диагностика

1. 1. Check radiator temperature signal voltage
2. 2. Test for shorts to power in sensor circuit
3. 3. Measure sensor resistance and circuit continuity
4. 4. Inspect for open circuits or high resistance
5. 5. Verify ECU signal processing accuracy

Решения по ремонту

• Repair shorted sensor wiring to power
• Replace faulty radiator temperature sensor
• Repair open circuits or high resistance issues
• Update ECU software if processing faulty
• Reset cooling system temperature adaptations

Профилактика

• Protect radiator sensor wiring from damage
• Regular circuit continuity checks in cooling system
• Address abnormal high temperature readings promptly