hi everyone, i have a 2016 prius, oil change every 6000 miles. the engine light is flashing. the computer is showing a misfire code, the car shakes when accelerating. my friend says it's a head gasket problem. but the coolant doesn't go away, and the engine oil is fine, there's no water in it. does anyone have any ideas? is it the head gasket? thx everyone it only has 130 thousand miles on it, and i never drove it fast or aggressively we changed the spark plug and it was rusty, but it didn't help
Head gasket problems have commonly been presenting as engine shakes right away on cold start, then smoothing out after a while. Shakes when accelerating (mid-load accelerating, not floored) might indicate the intake manifold EGR passages are (unequally) clogged, because those mid-loads are when EGR happens, not at idle and not when floored. Lots of other things also can cause misfiring under various conditions.
You need to read the error codes, rather than guessing at the problem or consulting AI. Since you changed the spark plugs. you didn't identify which cylinder was missing and didn't notice any differences in any of the spark plugs? You should probably take the car to a professional, since someone that knows what they're doing would've been able to ID the cylinder that was miss firing by the spark plug tip. Good Luck...
