code 41- cam sensor circuit - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-27-2006, 09:19 AM   #1
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Default code 41- cam sensor circuit

i checked for codes on my 92 (because the light cam on after ******* the engine for a few miles). and i got this code, but i don't know what to do about it since i haven't got a manual yet. Was wondering if anyone knew the fix off hand.
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Old 02-27-2006, 09:27 AM   #2
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If your cam sensor is indeed bad, you're going to be tearing into the timing chain cover. Time to get a manual.

The crank sensor SOMETIMES can throw this code out there, and even the ICM in rare cases. I'd clear the code for starters with a battery disconnect for 30 minutes. See if it comes back.
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Old 02-27-2006, 10:18 AM   #3
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Default Re: code 41- cam sensor circuit

Quote:
Originally Posted by pdqSSEi
i checked for codes on my 92 (because the light cam on after ******* the engine for a few miles). and i got this code, but i don't know what to do about it since i haven't got a manual yet. Was wondering if anyone knew the fix off hand.
The cam sensor is bolted into the timing cover under the water pump and on top of the crank pulley with one 10mm (head) bolt. In the pic below the sensor is at 11:00 O'Clock above the biggest pulley. It sits in a one-inch hole and is sealed with an o-ring. It picks up a signal from an interrupter magnet that snaps into a hole in the camshaft gear. The code 41 can be set if the electrical connection is bad (try this first), if the pickup is bad ($20, try this next) or the magnet has been thrown (more work). The book you need to buy will tell you to remove the timing cover to replace the magnet, and this is probably the most reliable fix. But BC member, Padgett found a way to change out the magnet without removing the timing cover. http://6007.us/cammag.htm

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Old 02-27-2006, 11:05 AM   #4
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Quote:
Originally Posted by willwren
If your cam sensor is indeed bad, you're going to be tearing into the timing chain cover. Time to get a manual.

The crank sensor SOMETIMES can throw this code out there, and even the ICM in rare cases. I'd clear the code for starters with a battery disconnect for 30 minutes. See if it comes back.
i cleared the codes like suggested and the code came back as soon as i cranked the car. It doesn't seem to change the way the car runs. i haven't noticed a difference.

and thanks for the picture for assistance that is a big help.
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Old 02-27-2006, 11:06 AM   #5
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You are operating in default mode without a cam sensor. Your injector timing pulses are off. You'll notice it in fuel mileage. And slightly decreased performance.
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Old 02-27-2006, 05:06 PM   #6
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Quote:
Originally Posted by willwren
You are operating in default mode without a cam sensor. Your injector timing pulses are off. You'll notice it in fuel mileage. And slightly decreased performance.
yes, i did notice when i went out for lunch and i noticed the idle was a little off and didn't seem to have normal amount of punch. well i guess i'll get to work on that this weekend thanks for the help.

between the new endlinks and bushing, and the sensor, i'll be a bonni-fied weekend
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Old 04-10-2006, 08:32 PM   #7
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I just tried to get my cam sensor off. After unscrewing the bolt the sensor assembly just rotates. I image that I could pry it off, but thought I should double check with people who have done it before... I don't know if there is a locking groove or maybe there is just a strong rubber seal that is holding it in
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Old 04-10-2006, 08:36 PM   #8
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Theres just a rubber oring holding it in if you have the one bolt off already. Pull it straight out.
Tim
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Old 04-11-2006, 12:06 AM   #9
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I am having the same problem, but it is intermittent. The car kicks that code right away, and will die all of a sudden at idle or just as I am taking off. I thought this may be because of idling issues with a larger cam, but could the cam sensor cause the same issues?
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