Hi All,

I had a CEL on my daughters 99S80 Turbo. It was also surging and stalled once. We have an O'reilly's around the corner so I took the car over and pulled these codes:

P0236
P0237
P1238

I put all three into the "advanced" search under the S80 Forum and got no results so I did them one at a time and came up with what they meant.

I found a blown rubber hose coming from the intake manifold to a check valve back to another pipe in the induction system. Hose has been replaced and all seems well for now (fingers are always crossed!).

This post has 2 purposes:

1. If anyone else has all 3 of these codes at the same time, the search function will bring up this post.

2. To thank the people who post all the helpful tech advice! Thank You!

Frank Out