What this code means

The gear selector drum actuator in the DCT is not achieving the correct position for the requested gear.

Symptoms

• Check Engine Light
• Failure to select requested gear
• Neutral between shifts
• Grinding during gear changes
• Transmission stuck in one gear
• Complete loss of drive

Common causes

• Gear selector drum actuator failure
• Position sensor malfunction
• Mechanical obstruction in drum
• Hydraulic pressure loss
• Synchronizer ring damage

Diagnostic steps

1. Read gear drum position PID
2. Command gear selection and monitor response
3. Check hydraulic pressure at actuator
4. Inspect selector drum position sensor
5. Listen for mechanical noise during shifts

Repair notes

Replace gear selector drum actuator or repair hydraulic system. May require transmission removal for synchronizer inspection.

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