What Does Code U0100 Mean? U0100 stands for “Lost Communication with ECM/PCM.” The Engine Control Module (ECM) is the computer responsible for controlling the engine. The ECM communicates with other vehicle control units via a communication bus. This bus, called the Controller Area Network ...
Jul 23/17 - New FAQ: What does ISO/SAE Reserved mean as a code description? Jul 14/17 - U010A, U010B, U010C, U010D, U010E, U010F Jul 12/17 - P2172, P2173, P2174, P2175, P2176 Jul 10/17 - P0586, P0587, P0588, P050A, P050B, P050C, P050D, P050E Jul 8/17...