DTC P121B Chevrolet
Lost Communication with Front Controls Interface Module
Lost Communication with Front Controls Interface Module
Description
Sets when the SDARS module is missing messages from the ACM for greater than 5 seconds. This results in loss of satellite radio functionality.
Cause and Solution
Subscription status Audio system concern SDARS module
Video Guide
Diagnostic Info
- DTC Code: P121B
- Brand: Chevrolet