540k MILES?! Toyota Sienna: Intermittent Misfire

This 2000 Toyota Sienna has over HALF A MILLION miles on the original drivetrain!! Owner says that it s running rough and the Check Engine light is blinking. P0305 is set. Place your bets now! THINK TOOL PROS: https://www.amazon.com/dp/B08XXWHQVJ?ref=exp_pinehollowautodiagnostics_dp_vv_d