P009D

Описание

Fuel Pressure Relief Control, Signal too High

Частые симптомы

• Possible fuel pressure relief system control issues
• Check Engine Light
• Erratic pressure relief operation
• Possible safety system false activation
• Reduced fuel system efficiency

Возможные причины

• Short to power in pressure relief control circuit
• Failed pressure relief control valve stuck on
• ECU driver circuit malfunction
• Wiring harness short to 12V
• Aftermarket fuel system interference

Диагностика

1. 1. Test pressure relief circuit for shorts to power
2. 2. Check pressure relief control valve mechanical operation
3. 3. Inspect wiring harness for damage
4. 4. Test ECU pressure relief control output
5. 5. Check for aftermarket fuel system components

Решения по ремонту

• Repair shorted pressure relief wiring to power
• Replace faulty pressure relief control valve
• Remove interfering aftermarket components
• Replace ECU if driver circuit failed
• Reset fuel system safety adaptations

Профилактика

• Professional fuel safety system work
• Regular pressure relief wiring inspection
• Avoid modifying factory fuel safety wiring