If code U0100 appears, it means that signals are lost between PCM and one or more modules of the vehicle. Code U0100 refers to lost signals between blocks. This indicates that the Electronic Control Module (ECM), also known as the Powertrain Control Module (PCM), has communication problems with other specific modules. Subject The U0100 code is a common network contact… Continue reading Lost Communication with ECM/PCM “A”
The technical definition of OBD-II generic trouble code P0603 is as an internal control module Keep Alive Memory (KAM) error..
The error code P0725 can be defined as Engine Speed Input Circuit that signifies that there are some faults in the engine speed input sensor signal of the vehicle..