What this code means

The boost pressure has exceeded the maximum allowed value.

Symptoms

• Check Engine Light
• Excessive power then limp mode
• Whining turbo noise
• Possible engine damage

Common causes

• Wastegate stuck closed
• Boost control solenoid failure
• Boost pressure sensor fault
• Blocked wastegate actuator hose

Diagnostic steps

1. Check wastegate operation
2. Test boost control solenoid
3. Monitor boost pressure
4. Inspect vacuum lines to wastegate

Repair notes

Address immediately to prevent engine damage. Check wastegate and boost control.

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