A flickering check engine light and rough idle on a Volkswagen Tiguan II usually point to ignition or vacuum issues. Here’s what to check first and whether it’s safe to keep driving.
What the Symptoms Mean
When the check engine light flickers and your Tiguan II idles rough, it's often a sign of a misfire that's actively happening. A steady light indicates a persistent problem, but a flickering light means the engine control unit (ECU) is detecting an intermittent fault—typically one that could damage the catalytic converter if ignored.
