Mazda 3 Zoom Z400 U0100 U0101 Fault: Lost Communication with PCM - Diagnosis and Fixes

Model: Mazda 3 Zoom Fault Code: U0100 Posted: 2015-11-03 09:34

Hi everyone, my Mazda 3 (Z400 model) is not starting and the vehicle remains in a revving state. After scanning, I've detected fault codes U0100 and U0101. The diagnostic description indicates lost communication with the Powertrain Control Module (PCM), with possible causes listed as wiring issues, CAN bus faults, or ECM problems. I'm looking for advice on how to properly diagnose and resolve this issue. Any insights from owners of stock Mazda 3 models would be greatly appreciated.