P1404 Trouble Code

I had my older Chilton's manual out for the other post, my book (1991 thru

1998) says P1404 is the EGR Pintle Position (system) and the fault description is "Circuit Fault". I don't know anymore than I did - don't know if this was helpful - maybe someone else will chime in...

The first thing to do with that code is to clear it and see if it comes back. Quite possibly, some debris is restricting the pintle from closing all the way. This will set that code. Many times this carbon or whatever will clean itself out and everything will be back to normal. You may have to remove the egr valve and clean it out. While you've got it off make sure the pintle moves freely. Try clearing the code first though and see if it comes back.

Thank you guys for the info. We cleared it while at AZ and I'll open it up tomorrow and try to clean it out. Should I use any particular cleaner for this task? I've cleaned the throttle body out once already and used carb cleaner, which I found out later is a bit too abrasive but worked nicely. Should I expect the same black grime that was in the intake and on the TB plate?

Thanks.

This code indicates that the EGR valve pintle did not reach the learned closed position, probably because it was blocked with carbon. The PCM will try to open and close the valve several times to dislodge it, and if the valve is still staying open too far, code P1404 sets.