CEL, I/M status, and drive cycles.

[tom4bren]

Have you thought about getting your exhaust checked for too much back pressure? If your cat is clogging, it can throw some really funky codes.

[Cobrajet]

Have you thought about getting your exhaust checked for too much back pressure? If your cat is clogging, it can throw some really funky codes.

I really don't suspect the cat, as my engine doesn't burn oil, my original EGR valve is clean, and the code has cleared on longer trips (which would naturally include multiple drive cycles.) The VX still runs great. I would think that a clogged cat would reduce performance drastically. I've not received any cat related codes, not even O2 sensor codes, since I removed the K&N filter.

If I can't clear the code with a few successful drive cycles I will turn it over to the experts with proper diagnostic tools to determine the cause. Other than this CEL my VX has ZERO faults.