DTC U2100-00: Start Stop Unit Configuration Not Completed: Notes

WARNING: This page is about a different car, the 2016 Mazda CX-3. However, it is still accessible from the selected car via links, so may be relevant.

Description	Start stop unit configuration not completed
Detection condition	Start stop unit configuration not completed.
Fail-safe	Although the engine cannot be started with the ignition switched off or to ACC, if the ignition is switched ON (engine off), the engine can be started.
Possible cause	NOTE: This DTC is output if configuration is not performed after replacing the start stop unit. Start stop unit configuration error Start stop unit malfunction
System wiring diagram	Not applicable