Circuit/System Description
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
The DTC is an informational DTC. The DTC indicates an emission related DTC set in the following control module:
- K9 Body Control Module
- K17 Electronic Brake Control Module
- K20 Engine Control Module
- K27 Fuel Pump Control Module
- K38 Chassis Control Module
- K69 Transfer Case Control Module
- K71 Transmission Control Module
- K114A Hybrid/Electric Vehicle Powertrain Control Module 1
- K114B Hybrid/Electric Vehicle Powertrain Control Module 2
The control module K20 turns on the malfunction indicator lamp (MIL) when the requesting control module sends a message over serial data.