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Old 10-21-2012, 04:30 PM
cabbit56 cabbit56 is offline
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Location: SF
Join Date: Oct 2012
Posts: 4
Mein Auto: 2000 Z3
2000 Z3 exhaust camshaft sensor

EDIT: originally it was a question thread. No one answered my questions and I got it fixed, so I'll just post what I did here.

Mine is a 2000 Z3, need to do a smog check but an engine light was on so I can't pass. The code is P1397, and the smog check shop told me it's the exhaust camshaft B. So after many google searches I kind of know what I have to do. Many people say it's a 10-15 minutes job so it sounds easy enough that I want to try to do it myself. I bought the part from Bavauto - the camshaft sensor, an o-ring, and a screw (they came together).

Took me quite a long time to find where it actually is under the hood.

I couldn't find it until I stuck my camera down and took a picture, then I saw a familiar shape.

I believe the thing I circled in red is the sensor. But how do I get it out?

Do I squeeze the place I circled in green (same squeezing place on the opposite side)? and pull it out? I tried but it didn't move a bit, but I didn't squeeze too hard as I wasn't sure if I was doing the right thing. (EDIT: yes, in order to take the connector out you need to squeeze that place and wiggle it out.)

Actually it was my luck that my engine light was off this morning when I started my car, so I seized the chance and drove to the smog check place. Had to let my car idle for 30 minutes because there were 3 cars before me, and I knew if I turned off my car and turned it back on, the engine light will also be on. When it's my turn, I kept my fingers crossed and hoped it'll pass, and it passed! But then I still got to fix the engine light, so I asked the technician if I should squeeze the connector and pull. After some explaining he said he could change that part for me, I was like "of course I wouldn't mind, thanks!" It took him less than 10 minutes, and he said I don't need to reset the light because it will turn off by itself. So I ran some more errands later today and after 2-3 starts, the light was gone, and did not come back on in the subsequent 2-3 starts. So I think it's fixed! Yay!

Last edited by cabbit56; 11-03-2012 at 09:53 PM.
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