Possible Causes

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

RCM concern

AO1: CHECK THE RCM MOUNTING

Verify the RCM is installed correctly and the fasteners are tightened to specifications. Refer to RCM Removal and Installation in Airbag Supplemental Restraint System (SRS) .
Is the RCM mounted correctly?

Yes	No
CARRY OUT the RCM self-test. DIAGNOSE the DTCs present. REFER to Airbag Supplemental Restraint System (SRS) .	REINSTALL the RCM or TIGHTEN the fasteners to specification. REFER to Airbag Supplemental Restraint System (SRS) .