P0021

Описание

Camshaft Position Actuator A Bank 2, Timing Over-Advanced

Частые симптомы

• Bank 2 reduced low-RPM torque
• Possible detonation on bank 2
• Check Engine Light
• Poor bank 2 idle quality
• Bank 2 specific fuel economy issues

Возможные причины

• Stuck or binding bank 2 VVT actuator
• High oil pressure to bank 2 actuator
• Faulty bank 2 VVT control solenoid
• Bank 2 mechanical timing component wear
• ECU bank 2 calibration issue

Диагностика

1. 1. Check bank 2 camshaft position vs desired
2. 2. Test oil pressure to bank 2 VVT system
3. 3. Check bank 2 VVT solenoid operation
4. 4. Compare with bank 1 timing values
5. 5. Inspect bank 2 mechanical timing

Решения по ремонту

• Replace sticking bank 2 VVT actuator
• Repair bank 2 oil pressure regulation
• Replace faulty bank 2 VVT solenoid
• Correct bank 2 mechanical timing
• Update ECU bank 2 calibration

Профилактика

• Monitor bank-specific oil pressure
• Address bank 2 oil leaks promptly
• Regular multi-bank timing inspections