[wonton]

BMW 3 series E46 325i wagon 2004 72,000 mile

Just did oil change, mobil one, new filter, that's all.

After driving the car for 30 minutes, engine stumbled and got the engine light. Peake meter showed 28BC code:Exhaust camshaft bank 1: stiff
And a 28B8 code: Exhaust bank 1-mechanical.

I've read a few posts and the results were incomplete. I thought with this much time passed that more knowledge of these codes may have arisen.

I am wondering if the exhaust vanos solenoid was bad, that this could be the cause. Cam shaft sensor for this has been replaced in the past 2 years.

Did the following:

checked new oil level... on the button.
Installed new exhaust camshaft position sensor. (yes again).(purchased from Pelican)
Switched vanos solenoids to see if code changed from exhaust to intake. (It did not)
Tested solenoids and they actuated well.

Code 28B8 returned--exhaust side again. Engine rough at about 700 rpm.

Any thoughts would be appreciated. Thanks...