Back in the old days BC *(Before Computers) the only way to burn a valve was to run too much advance on the timing or run too lean of a mixture or both.

With Computer controlling everything from fuel mixture to ignition timing I find it hard to believe that you could burn a valve, without the computer warning you of the impending disaster. Hell if you don't put the gas cap on right you will set off a CEL for the evap system. Even a leak on the DISA valve o-ring will cause the computer to throw up a P0171 or P0174 DTC for a lean condition in bank one and bank two.

The two codes you posted are for misfires in cylinders. A lean condition is consider a misfire by the computer because the rotation speed of the crankshaft is not as great compared to a good cylinder.

I think the moral of this story is that one should not ignore CEL or SES even if you think the engine is running right because you are can not detect the little nuances like a computer.

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