Network and communication codes
Researched from the OBD-II standards and published manufacturer specifications
Quick answer
Lost communication between modules, bus faults and control module mismatches. There are 8 codes in this group on the site.
- U0001High Speed CAN Communication Bus
- U0100Lost Communication with ECM/PCM
- U0101Lost Communication with TCM
- U0121Lost Communication with ABS Control Module
- U0140Lost Communication with Body Control Module
- U0155Lost Communication with Instrument Panel Cluster
- U0401Invalid Data Received from ECM/PCM
- U0402Invalid Data Received from TCM