Your ID.4 doesn’t have an idle, but that flickering MIL could point to a 12V battery issue or cooling system fault. Here’s what to look for first.
First off, let's clear up a common misconception: your Volkswagen ID.4 is a fully electric vehicle, so it doesn't have an engine that idles. What you're likely feeling as a “rough idle” is probably a subtle vibration from the electric A/C compressor, a cooling fan cycling on and off, or even the thermal management system kicking in. That flickering check engine light (MIL) is still very real, though, and it warrants attention.
