Car didn't start, was clicking but after a while it started, what could it be?
Hey Scotty I have a 2008 Chevy Aveo5 Automatic with around 158,000KM, when I came to start the car it did not start and kept clicking. After waiting a while it started, why is that? I scanned it and the battery was good but there was a code "U0100-04" what does the code mean? Thanks for your help.
This is, indeed, a communications error code. The ECM is having trouble reading bus data. Now, realize that that is a very vague code and could still be any number of things. I would:
1. Check connections to make sure they are tight and not corroded
2. Check the battery and make sure there are no issues there
If both check out, I would say you have a wiring short somewhere in the vehicle and in order to find it you would have to test sections of wiring which is more of a pain than it is worth for you to do and not worth the cost to pay someone to do. You may just live with it honestly.
Sounds like either the battery or the starter.
Try looking up the code online or have a part store hook up their scan tool to read it. Did you check alternator? To me it could be starter going bad based off what you said.
The ECM has lost communication with the engine because of poor electrical connection, wiring harness shorts or a bad ECM. Check all you plug in connections for corrosion or disconnect.