Conditions for Setting the DTC
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.
B2B28
The actuator reports a learned value greater than expected value for the range
or
The actuator does not detect an end stop at the end of the expected range
or
The actuator has been moving too long before the end stop is detected
B2B29
The actuator reports a less than expected value for high end of the expected range after the end stop has been detected at the low end
B2B2A
The communication messages with the actuator are corrupted
The error occurs 8 out of 10 sample counts