Shift Motor Phase U-V-W Performance

Check these first

• A weak or open phase in the shift motor U-V-W windings
• A damaged wire to one shift motor phase
• A shift motor that binds and cannot reach the commanded gear
• Corrosion in the shift motor connector
• Low or dirty transmission fluid affecting shift effort

What to do next

1. Check transmission fluid level and condition
2. Inspect the shift motor connector and phase wiring
3. Test the shift motor U-V-W phases for opens and shorts
4. Command a shift with a scan tool and watch motor response
5. Replace the shift motor if a phase is dead
6. Clear the code and retest

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