My truck is running fine. It's had the 3 amigos (intermittent) since I bought it a year and a half ago. The check engine light does sometimes show a p1590 at the same time, but not always. Here are the codes:

P1590 (intermittent)
P1170
P1174
P0441-Purge Valve

I did replace the purge valve a few months ago, but I didn't use the OEM or the Hyundai part, I used a different one that is evidentally known to fail. I've also still got the factory original MAF at 135k miles, though all 4 O2 sensors have less than 3k miles on them.

I should note, the 3 amigos went away for quite some time on two seperate occasions. Once for several weeks after I replaced my front driver wheel bearing. Second for a couple or three weeks after I had my head gaskets and other extensive engine work done.

Any ideas? My first though is just replace the MAF and Purge Valve, but I'd like to get a second opinion before I drop $200 on a guess.

 

You say you replaced the front wheel bearing. Do you mean front hub?

 

Righto, the bearing was going out so I replaced the whole front hub assembly/axle seal/axle nut combo.

 

Oh, and I forgot to add, I've got a driveline vibration that shakes like a mother sometimes. I think it's caused by a bad tie rod end which I'm replacing soon, so that might clear up the ABS fault. I hope.

 

My first thought is look for vacuum leaks and exhaust leak. Then purge

 

Thanks Dusty. I do have a minor pre-cat exhaust leak. I was ignoring it till I installed headers and got a custom y-pipe.

I'll check for vacuum leaks too.

 

well that can give you the 70's