P0078

Описание

Exhaust Valve Control Solenoid, Circuit (Bank-1)

Частые симптомы

• Reduced exhaust system performance
• Check Engine Light
• Possible variable exhaust system issues
• Reduced engine breathing efficiency
• Possible emission increases

Возможные причины

• Open circuit in exhaust valve control wiring
• Failed exhaust valve control solenoid
• Blown exhaust valve system fuse
• Corroded electrical connectors
• Wiring harness damage

Диагностика

1. 1. Check exhaust valve control system fuse
2. 2. Test continuity to exhaust valve solenoid
3. 3. Check solenoid resistance values
4. 4. Inspect wiring and connectors
5. 5. Test ECU exhaust valve control output

Решения по ремонту

• Replace blown fuse
• Repair open wiring circuit
• Replace faulty exhaust valve control solenoid
• Clean corroded connectors
• Repair damaged wiring harness

Профилактика

• Protect exhaust valve control wiring from heat
• Regular exhaust system electrical checks
• Address emission issues promptly