41 - Cam Sensor Circuit - I need to do this - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 05-25-2005, 08:04 PM   #1
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Default 41 - Cam Sensor Circuit - I need to do this

Guys..
im going to be serious here..
It dosent have much time left in it.. the engine is slowly dieing with this 41 - Cam Sensor Circuit error. I need to do a surgery on it right away. What do I need.. really waht DO I need. wahts the quickest easiest way to fix this issue. Should I sell it?
really what to do
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Old 05-25-2005, 08:12 PM   #2
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I have the same problem, or so at least I think. After I cleaned my IAC and took the car for a test drive, my SES light came on. Error code 41 keeps popping up. Now it'* possible that it'* not the CAM Sensor itself, but it may be the magnet around the sensor. This is possibly my problem because my light came on after I red lined my car for the second time during the test drive.

Padgett has a guide here, that may help you at least fix the magnet portion...

http://6007.us/cammag.htm .

But a few of the other members will give you some better advice.
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Old 05-25-2005, 09:26 PM   #3
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Several people have used Padgett'* method with good results....

I replaced my timming chanin & sprokets along with the Interupter( cam magnet ) and also had to get the timming cover gasket set complete with a front main seal and water pump gasket.... I found my magnet stuck to the block...LMAO

I threw a code 41 after a 5000 rpm run..... I heard Vrrrrroooooooooooooommm( 5k rpm at this point ) * sudden noise, Klink Klink followed by the SES light * By then it was over and the SES light was showing me the way...lol

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Old 05-25-2005, 11:49 PM   #4
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It'* not that big of a deal to change it. I had mine done cause I have no time and I also asked the shop to have a peak at my gears and timing chain while they were at it since it is all there. You have to remove the timing chain cover to access the magnet. You may be lucky and can change the sensor without removing the cover, but my magnet was toast so I didn't have a choice.
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Old 05-26-2005, 12:03 AM   #5
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This is a very common problem on the LN3 3800...

At the time I spent

$14 on the timming cover gasket set..

$40 on the timming chain set

$14 on the Interupter( had to get it at the dealership as no one locally stocked it )

Oil and oil filter as well... Car was up and running in a short time..

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Old 05-26-2005, 02:19 AM   #6
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hardest part of the job? getting the friggin harmonic balancer off. dumbest part? forgetting that the water pump pully must be put on <not necessarily tightened> the pump before the pump goes back on.

with that said...

go get'm tiger!
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Old 05-26-2005, 07:39 AM   #7
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IMO, the biggest problem with being in there, is if I were to take the time to do all of that, I would replace the Cam Sensor, Interrupter [I guess.. right?], Timing Chain, Harmonic Balancer, and Crank Sensor. If I delve into something, I may as well make the most out of my time, should I not?


-justin
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Old 05-26-2005, 11:29 AM   #8
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Quote:
Originally Posted by opensourceguy
IMO, the biggest problem with being in there, is if I were to take the time to do all of that, I would replace the Cam Sensor, Interrupter [I guess.. right?], Timing Chain, Harmonic Balancer, and Crank Sensor. If I delve into something, I may as well make the most out of my time, should I not?


-justin
If the cam sensor and harmonic balancer are good I would leave them alone... The balancer and crank sensor are easy enought to get to, it only takes a matter of minutes with the correct puller... Cam sensors very rarely ever fail on these 3800'* BTW...

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Old 05-26-2005, 02:26 PM   #9
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Hey guys

thanks for the info, really amazing I will try to just fix the sensor for now. screw doing the rest, when it breaks ill fix the rest. But for now i just want to fix the sensor problem.
But the only part I dont understand is that interrupter part. in that manual u guys posted it shows on the very first part the sensor taken off, but there is nothing behind it. its blank but on the next page it shows the dirty interrupter. Do I need to line it up with the hole? how do I go upon doing that?

Btw guys, I just hope that this IS the problem... ill give you a little bit info besides the code that i got from the computer. The car acts like it has no balls. I cant floor it, it just shudders and dosent do anything, I have to be gentle with the gas pedal.. and I mean gentle or the car just shutters. As well when I used to start the car I could just drive off. Now its like I start it..and if I go drive off.. feels like it wants to stall. its also part of this situation.

Anywas this intruppter dosetn sound hard to do.. ill probley be able to do it. I just need the part and figure out how to get the thing to line up with the hole .

Thanks guys really
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Old 05-26-2005, 02:47 PM   #10
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you slowly trun the crank untill the interupter lines up with the hole...

as for running like complete crapp, when it does this shut it off and restart... You have a 1 in 6 chance of catching the timming correctly...

The Cam sensor is for Cylinder #1 TDC, this is a reference for the computer for true SFI...

In any carse, when it runs like totall dog crapp, shut it of and restart... Might take a time or 2... If its really bad and stutters and stumbles and has no power at all, the restart should help...

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