CEL, I/M status, and drive cycles.

[Etfren]

The readiness monitors reset every time the CEL is cleared, or the battery is disconnected. So if you have done that and are checking the monitors before doing that drive cycle, then yes, that is normal.

The drive cycles for the monitors are meant to be accomplished during normal driving conditions, but some may take a few weeks to set depending on your driving conditions.

I was also having trouble with a 1404 code in Moab this year. When I got back I took my old EGR off, cleaned all the carbon out of it, then also used some de-carbon spray down the EGR tube itself. Let that sit in there for an hour or two, started the vehicle to blow it out and did it again. Haven't had the issue since.

[Cobrajet]

Tomorrow I will do another drive cycle and check the codes and I/M status, but NOT reset the CEL. Then I will check the I/M status again when I get home. If they remain "READY", I will just try doing a few more dedicated drive cycles to see if I can clear this code. In the meantime, I will continue to use my trusty analog "CEL eliminator" (aka piece of construction paper.)

There are some interesting videos on YouTube showing how they can test an EGR valve operation against a set of technical parameters. I don't really want to pay a technician 80/hr if I can clear it by driving. But, if push comes to shove I may have to bite the bullet.

[Cobrajet]

Attempted a Drive Cycle this afternoon, but I suspect that it was too hot (ambient temps over 90, and probably hotter in the garage.) All of the sensors, except Evap, tested "Ready" during initial warm up. The HO2 sensor is usually "Not Ready". The Evap never did pass. I'll have to try again next weekend... in the morning. What a pain!

[tom4bren]

Sorry you're having troubles Dubl G. Hope you get a handle on it soon.

[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.