P0025

Описание

Bank 2: Camshaft B (Exhaust): Retard Setpoint not Reached (Over-Retard)

Частые симптомы

• Poor bank 2 exhaust scavenging
• Reduced bank 2 high-RPM power
• Check Engine Light
• Possible bank 2 emission test failure
• Reduced bank 2 engine efficiency

Возможные причины

• Low oil pressure to bank 2 exhaust VVT actuator
• Sticking bank 2 exhaust camshaft phaser
• Clogged bank 2 exhaust-side oil passages
• Faulty bank 2 exhaust VVT control solenoid
• Bank 2 exhaust mechanical binding

Диагностика

1. 1. Check bank 2 exhaust camshaft position data
2. 2. Test oil pressure to bank 2 exhaust VVT system
3. 3. Inspect bank 2 exhaust VVT solenoid
4. 4. Check bank 2 exhaust timing components
5. 5. Monitor bank 2 exhaust performance

Решения по ремонту

• Increase bank 2 oil pressure to spec
• Replace sticking bank 2 exhaust camshaft phaser
• Clean bank 2 clogged exhaust oil passages
• Replace faulty bank 2 exhaust VVT solenoid
• Correct bank 2 exhaust mechanical binding

Профилактика

• Maintain proper oil for multi-bank engines
• Address bank-specific exhaust restrictions
• Regular bank 2 breathing system checks