U0100 Diagnostic Trouble Code Discussion for May 2025
Lost Communication With ECM
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| Help Request | Posted | |
| 2013 Nissan Titan S 5.6L No Start VIN: 1N6AA0EJ7D U0100: Loss of communication ECM A Current. Initially vehicle came in for crank no start, scanned dtcs and no communication with abs or pcm with key on. Then about 5 minutes with key on, idpm randomly clicked relays and communication was present- replaced idpm and performed relearn procedure. Vehicl... |
May 05, 2025 | |
| 2016 Toyota 4Runner SR5 4.0L No Start VIN: JTEZU5JR3G U0100: Lost communication with PCM/ECM/EV A. I have the Code U100 multiple times. I have no check engine light, and I can't communicate with the PCM or the TCM. I have tried unplugging multiple sensors and have checked for the 5-volt reference, and I do have it. I have used two different scanners wit... |
May 22, 2025 |
