JFitz_2000_4.2

My Check Engine light came on the other day. Used a friend's setup to read out the fault codes. Here is what I got :

17831 (P1423) Sec. Air Inj. Systen (B1) flow too low
17819 (P1411) Sec. Air Inj. Sys. (B2) restricted flow

I found some posts indicating this could be a cracked/broken line somewhere, but my friend said it could also be a bad MAP sensor (common, from wat I can see). Anyone have any experience/suggestions?

airmax617

comes on when it's cold...mine came on twice with the same codes but reset itself after a while

PaulW

If so....just pop your engine covers and see if the vacuum line is off, probably a 10 minute job.<ul><li><a href="https://forums.audiworld.com/a8/msgs/19663.phtml">If you haven't seen the pictures, click here</a></li></ul>

Epicman1

The vacuum lines can be spotted after you remove the top plastic engine cover. You will be looking for the lines with the cotton-type material on the outside. These usually dry-rot over the years due to engine heat and age.