“The spark plugs, and fuel filter are org.”
Do yourself a favor and see what the factory maintenance schedule specifies for replacement of the spark plugs and the fuel filter. I find it hard to believe that replacement of at least the spark plugs isn’t listed for a lower mileage. And, even if the manufacturer does specify, let’s say, 100k for spark plug replacement, the spark plugs can be very close to impossible to remove when they are left in place for that many years/miles.
At the very least, have the spark plugs changed a.s.a.p. and see what the replacement schedule for the fuel filter is also. Even if these two maintenance procedures don’t fix the ongoing noise problem, they are still vital to the longevity of the engine.
Also, new spark plugs could likely result in improved gas mileage and could be related to the CEL being illuminated.