A flickering check engine light and rough idle on your Toyota Tundra XK70 usually points to a misfire. Here’s what to check first, and why you shouldn’t ignore it for long.
Why Is My Tundra's Check Engine Light Flickering?
When the check engine light flickers intermittently while the engine idles rough, I like to tell folks it's the truck trying to get your attention without throwing a full-blown tantrum yet. On the XK70 generation, this almost always points to an engine misfire that's happening at low RPM. A solid light means a stored trouble code, but a flashing light means the engine is pumping unburnt fuel through the exhaust — and that can damage the catalytic converter if you keep driving for too long.
