P0053

Описание

HO2S Heater, Resistance Bank 1 Sensor 1 (PCM)

Частые симптомы

• Extended O2 sensor warm-up time
• Check Engine Light
• Possible slow closed-loop operation
• Delayed emission system readiness
• Reduced cold emission performance

Возможные причины

• Heater element resistance out of specification
• Aging O2 sensor heater element
• Partial heater element failure
• Corroded sensor connections affecting resistance
• ECU resistance measurement circuit fault

Диагностика

1. 1. Measure actual O2 sensor heater resistance
2. 2. Compare with manufacturer specifications
3. 3. Check for corroded or damaged connections
4. 4. Test heater circuit voltage drop
5. 5. Verify ECU resistance measurement accuracy

Решения по ремонту

• Replace oxygen sensor with out-of-spec resistance
• Clean or repair corroded connections
• Replace faulty wiring affecting resistance
• Replace ECU if resistance measurement circuit faulty
• Reset emission system adaptations

Профилактика

• Use quality O2 sensors with correct specifications
• Protect sensor connections from corrosion
• Regular emission system electrical checks