DTC C1093 [Dynamic Stability Control: Notes

WARNING: This page is about a different car, the 2007 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

DTC C1093 POSSIBLE CAUSE

DTC C1093	DSC OFF switch system
DETECTION CONDITION	Continuous ON signal from the DSC OFF switch for 5 s or more is detected.
POSSIBLE CAUSE	The driver pressed and held the DSC OFF switch for 5 s or more. Short to ground in the wiring harness between the DSC HU/CM terminal P and the DSC OFF switch terminal A DSC OFF switch malfunction
Courtesy of MAZDA MOTORS CORP.