P004D

Описание

Turbocharger / Supercharger Boost Control 'B', Signal too High

Частые симптомы

• Secondary turbo control issues
• Check Engine Light
• Erratic secondary boost pressure
• Possible secondary turbo overspeed protection
• Reduced twin-turbo efficiency

Возможные причины

• Short to power in secondary boost control circuit
• Failed secondary boost control solenoid stuck on
• ECU secondary driver circuit malfunction
• Secondary wiring harness short to 12V
• Aftermarket secondary controller interference

Диагностика

1. 1. Test secondary boost circuit for shorts to power
2. 2. Check secondary boost control solenoid operation
3. 3. Inspect secondary wiring harness for damage
4. 4. Compare ECU outputs for both boost systems
5. 5. Check for secondary aftermarket controllers

Решения по ремонту

• Repair shorted secondary boost wiring
• Replace faulty secondary boost solenoid
• Remove interfering secondary aftermarket components
• Replace ECU if secondary driver failed
• Reset secondary boost adaptations

Профилактика

• Professional twin-turbo performance upgrades
• Regular secondary turbo wiring inspections
• Avoid splicing into secondary boost wiring