A flickering check engine light and rough idle on your BYD Han often points to a misfire or sensor issue. Learn the most likely causes, which parts to inspect first, and whether you can keep driving.
If your BYD Han’s check engine light is flickering on and off and the engine feels shaky at idle, you’re likely dealing with an intermittent misfire or a sensor glitch. As a mechanic who’s worked on many modern EVs and hybrids, I can tell you that on the Han – especially the DM-i plug-in hybrid – the most common culprits are the spark plugs, ignition coils, or a failing mass airflow sensor. A flickering CEL usually means a problem that can damage the catalytic converter if ignored, so let’s break it down.
