Camshaft Interrupter Magnet
Glad your situation is fixed! Great job! In the one I did today, the magnet appeared to be intact on the sprocket. However, something didn't look quite right. The plastic housing that holds the magnet was packed with sludge and parts of the plastic housing were gone. I used a dental-like pick and probed it. The plastic top fell away and revealed a much smaller magnet encased in sludge. I pulled it out with needle nose pliers and it was about 1/8" cubed in size, about 2.5 times as small as a new one. I am not sure how a magnet could remain in the plastic housing, yet shrink to less than half it'* original size. Apparently the now smaller "eroded" magnet was not strong enough to trip the sensor. Also, a new magnet is shiny like chrome. This was dull and black. I picked and pulled all the old brittle plastic out, cleaned the complete area with a rag and then acetone and Q-tips. I inserted a new magnet using the same method outlined in Padgett'* method. Worked great. I believe you were really fortunate and the camshaft sensor really was the issue, however, if you get Code 41 again in the near future, consider the magnet, even if it "looks" like it is there. In this case, perhaps the new sensor you installed was more sensitive and was able to pick up the now smaller, weaker magnet'* signal. If this happens (hopefully not), replace the magnet and never look back.