: If the full calibration fails, run individual function tests to see if specific movements (like clutch engagement or disengagement) are failing on their own. JustAnswer technical instructions for clearing this code, or are you looking for a product review for a different device with this model number? Troubleshooting VCA01000 and ATO3112D in 2011 Volvo 780
The error is often linked to newly installed rebuilt transmissions or clutch actuator/cylinders that fail to synchronize with the Transmission Control Module (TCM). Diagnostic & Reliability Factors vca01000