‘04 S here. I just replaced the clutch and pressure plate, an axle, and the timing cover gaskets. I also did an oil and filter change. In order to accomplish all this I removed quite a few components from the engine compartment (via FESM) to allow access to the shift cables, steering knuckle, subframe, etc.. Once everything was back together, I started the car and came up with P1689, P1242 and P1109 OBD codes. The car has never run rougher. I’m reading that it could be a vacuum problem. Has anyone experienced this issue before and if so, how did you solve it?

 

Solution found for P1689, P1242 and P1109 OBD II codes: There are three separate vacuum lines that attach to the supercharger. One goes directly into the supercharger right above the end of the supercharger air plenum (where the green gasket is) opposite the throttle body. The line itself has a protruding circle approx. one inch from its end That line was plugged in but not fully seated down to the protruding ring. There are also two other similar vacuum lines that fit into receptacles in the middle of the supercharger air plenum. These two lines also have the protruding circles. They were plugged in when I installed the plenum but evidently worked themselves out (very hard to see from above). Repair tip: Use a pair of needle nose pliers on the tubes just above the protruding circle and without squeezing the tubes press down firmly. All three vacuum lines should be fully seated all the way to the protruding circles. My pain is your gain because my Mini started immediately after this repair and runs perfectly after this fix. I hope this helps someone in the future. Cheers.

 

By coincidence I was just reading about this on the web.
I recently scored a supercharger in great condition and was wondering how to R&R the very same vacuum lines if I should ever have to.
Thanks!

 

To remove the vacuum lines, press down on the red/green circular lock at the bottom. Another repair tip: The black air plenum is a PITA to install because, not only does it have the two vacuum lines attached, one end attaches to the supercharger (where the green gasket is) and the other end holds the throttle body. There's also a short, stiff hose that attaches the plenum to the driver's side intercooler horn. Do yourself a favor when dealing with the S/C plenum -- remove the throttle body (four bolts and the air intake hose). Move it to the side and remove the driver's side intercooler air horn (three nuts). That provides plenty of room to attach the vacuum lines and seat the plenum to the S/C. You need only remove the top clamp on the hose attached to the horn to lift the horn free. This all sounds complicated but it's not and it gives you the best chance of installing everything correctly because you definitely do not want to do it a second time. Good luck.

 

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