What your seeing in the photo you posted is the Cam Interupter Magnet.
It supplies the magnet impulses that are delivered to the Cam Shaft
sensor which relays back to the computer. If there is no signal it will
trip code 41.
More than likely your 14 year old Cam Interupter Magnet is broken off as
You can remove the cam sensor and bump your engine till the Interupter
comes into view in the hole in the timing cover. You'll need a mirror &
strong flashlight to see it. Tey run about $9.00 at the dealer and are
no bigger than a a stack of 3 nickels.
Replacing the Interupter is a job, you got to pull the harmonic balancer
and timing cover off and the timing chain assembly has to come out as
well. The Cam Interupter presses in from the backside of the upper
I just had mine replaced last Spetember. I didn't see the need for a new
timing chain set but got one anyway. The old one looked fine despite my
There is a nylon timing chain tensioner you should replace seeing its
apart, that usually has a big wear mark in it from riding against the
No More code 41 for me
1991 Pontiac Bonneville LE
3800 V6 ( C ), Black/Slate Grey
~~~The Former Fleet ~~~
89 Cavalier Z 24 convertible
78 Holiday 88 coupe
68 LeSabre convertible
73 Impala sedan