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DTC B1231: SAS Control Module Activation (Deployment) Control Freeze: Notes

WARNING: This page is about a different car, the 2005 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: DTC B1231 - Detection Condition And Possible Cause Chart
G03700806Courtesy of MAZDA MOTORS CORP.