Record the exact error
Photograph the message and note the operation, device part number and vehicle details. Record battery-support equipment, cable arrangement and any prior tuning software. Do not clear or discard information needed by support.
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Follow the official recovery path
COBB identifies communication and prior-software issues among possible causes. Use the instructions for the exact error and application. Do not unplug, cycle power repeatedly or try a different vehicle’s map as an experiment.
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Resolve the cause before retrying
Confirm approved power support, connections and software compatibility with support. A device that was never uninstalled from another car is a different problem from an interrupted flash. Keep the vehicle stationary until the programming state and next step are clear.
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Sources / references 1
- Tuning developer documentation ↗Reviewed Oct 6, 2026
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