Does anyone know what the code p0601 means? It says ROM read only module. What does that mean or what can I do to fix it. I was driving and the engine shut off. It flashed up engine reduced and then it cut off so I put in neutral to pull off side of road and I waited a few min and started it back up and it started and I drove some more and it did same thing. I am just wondering if anyone knows of what may be causing it and what I can do to fix it.