P0004

Описание

Fuel Volume Regulator Control, Signal too High

Частые симптомы

• Rich running condition (black smoke)
• Poor fuel economy
• Fuel smell
• Check Engine Light
• Possible catalytic converter damage

Возможные причины

• Short to power in control circuit
• Failed fuel volume regulator stuck open
• ECU driver circuit malfunction
• Wiring harness damage
• Intermittent connection issues

Диагностика

1. 1. Test control circuit for shorts to power
2. 2. Check fuel pressure readings
3. 3. Inspect wiring harness
4. 4. Test fuel volume regulator resistance
5. 5. Check for other fuel-related codes

Решения по ремонту

• Repair shorted wiring
• Replace faulty fuel volume regulator
• Repair damaged wiring harness
• Replace ECU if driver circuit failed
• Reset adaptations after repair

Профилактика

• Regular wiring harness inspection
• Avoid aftermarket electrical modifications
• Protect connectors from moisture