Circuit/System Verification
WARNING: This page is about a different car, the 2012 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Diagnosis of this DTC is accomplished via the symptom or an additional DTC, Refer to Symptoms - Data Communications , DTC U0100-U02FF (without HP6) , DTC U0100-U02FF (with HP6) .