DTC Descriptors
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic procedure supports the following DTCs:
- DTC U0100 Lost Communication With Engine Control Module (ECM)
- DTC U0101 Lost Communication With Transmission Control Module (TCM)