Variable Valve Lift System Performance Bank 2

What this code means

The variable valve lift system on Bank 2 is not meeting performance expectations.

Symptoms

• Check Engine Light
• Uneven power between banks
• Engine vibration at certain RPMs
• Reduced high-RPM power
• Valve train noise Bank 2

Common causes

• Worn valve lift mechanism Bank 2
• Oil flow restriction Bank 2
• Control solenoid failure
• Mechanical wear in rocker assembly
• Clogged oil passage

Diagnostic steps

1. Monitor Bank 2 valve lift PID
2. Check oil pressure at Bank 2 actuator
3. Command lift change and verify Bank 2 response
4. Compare Bank 1 vs Bank 2 lift transition timing
5. Inspect oil passages Bank 2

Repair notes

Replace Bank 2 variable valve lift mechanism.

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