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Old 10-03-2017, 08:02 AM   #1
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Camshaft position sensor help

Before you tell me to search the forum for the answer, I did, I am a black and white procedural oriented individual (former submarine Sailor). I have the 101 Projects and a Bentleys, I've searched Youtube and can not find how and where to access the Camshaft position sensor to either check voltage or replace the units. Last week I had a flashing CEL with the P0341 code along with 9 others. The weather is nice and I want to drive my 99 Box base.

Would someone please point me in the right direction?

How and where do I access them?

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Old 10-03-2017, 10:02 AM   #2
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You need to post all the codes with their descriptions. That many codes is a complicated problem. You need to be able to look at all the codes together to make a correct diagnosis.
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Old 10-03-2017, 10:08 AM   #3
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Here's some interesting info:
https://rennlist.com/forums/boxster-and-boxster-s-986-forum/869939-p0341-and-p01397-1999-and-older.html
(function of sensor in 1997-1999 Box's)

I just went outside to cover a (very dirty) 2.5L engine before the rain starts. Here's some pics I took:




Hope that you do not need to touch the bank one sensor...
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Old 10-04-2017, 03:54 AM   #4
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Thanks, this is helpful.

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Originally Posted by 78F350 View Post
Here's some interesting info:
https://rennlist.com/forums/boxster-and-boxster-s-986-forum/869939-p0341-and-p01397-1999-and-older.html
(function of sensor in 1997-1999 Box's)

I just went outside to cover a (very dirty) 2.5L engine before the rain starts. Here's some pics I took:




Hope that you do not need to touch the bank one sensor...
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Old 10-04-2017, 08:18 AM   #5
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These are the codes that I had:

P0300-P0306
P0341
P1313-P1318

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Originally Posted by san rensho View Post
You need to post all the codes with their descriptions. That many codes is a complicated problem. You need to be able to look at all the codes together to make a correct diagnosis.
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Old 10-07-2017, 12:06 PM   #6
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I'm sure by now everyone is tired on this thread, however, I have another question.

Do I need to remove the AOS and intake manifold behind the drivers seat to access both camshaft position sensors?
I spent the better part of the afternoon searching for them and was only able to put eyes on the one behind the drivers seat. With that said, I could not see any way to access it w/o removing the manifold.

All I want to do is get the car back on the road. Neither the Bentleys or 101 Projects provide adequate details on how to access them.
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Old 10-07-2017, 05:14 PM   #7
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Quote:
Originally Posted by flouese View Post
These are the codes that I had:

P0300-P0306
P0341
P1313-P1318
Just guessing but you have misfire on all cylinders and an cam issue. So do you have a Durametric and can you check cam deviation. I guess replacing cam sensors is a good firs step. I'm just learning Porsche so please ignore me but I guess this sounds like it could be serious.
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Old 10-09-2017, 06:20 AM   #8
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Nobody here can answer my question? Do I need to remove the intake and AOS to test/remove/replace the camshaft position sensors?
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Old 10-09-2017, 07:39 AM   #9
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Quote:
Originally Posted by flouese View Post
Nobody here can answer my question? Do I need to remove the intake and AOS to test/remove/replace the camshaft position sensors?
No...................
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Old 10-09-2017, 08:08 AM   #10
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If it really is the "Cam Sensor"(unlikely) it is more likely a wiring fault to the Cam sensor.
So you need to check for signal at the sensor connector, not just replace the sensor. Access is awful .
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Old 10-09-2017, 11:03 AM   #11
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Did you see my post on this?
http://986forum.com/forums/performance-technical-chat/63180-cam-position-sensor-replacement.html

I replaced both cam sensors. I did not have all 3 codes like you do but after I replaced the passenger side sensor I got a code for the drivers side sensor. I replaced that and the code would not go away. So I took it to a indy shop and they found the passenger side cam positioning solenoid was bad. They replaced it and I have been code free for over a year.


Edit: I did not have to remove anything except move the AOS out of the way for either sensor.
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Last edited by rczap; 10-09-2017 at 11:03 AM. Reason: Added sentence
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Old 10-10-2017, 03:22 AM   #12
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If I can figure how to disconnect the lines to them and check their voltage, I will try that first. Again, I still cannot figure how to get in there to disconnect them. Looks like another evening trying to figure this out. Thanks for the assist.

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Originally Posted by rczap View Post
Did you see my post on this?
http://986forum.com/forums/performance-technical-chat/63180-cam-position-sensor-replacement.html

I replaced both cam sensors. I did not have all 3 codes like you do but after I replaced the passenger side sensor I got a code for the drivers side sensor. I replaced that and the code would not go away. So I took it to a indy shop and they found the passenger side cam positioning solenoid was bad. They replaced it and I have been code free for over a year.


Edit: I did not have to remove anything except move the AOS out of the way for either sensor.
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Old 10-10-2017, 03:23 AM   #13
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WOW, this was helpful in getting my car out of my garage... All I want to do is get this one back on the road and start the rebuild on my 66 912...
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No...................
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Old 10-10-2017, 03:24 AM   #14
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Thanks. If I can figure how to get my meat hooks on them, I will start here.

Quote:
Originally Posted by Gelbster View Post
If it really is the "Cam Sensor"(unlikely) it is more likely a wiring fault to the Cam sensor.
So you need to check for signal at the sensor connector, not just replace the sensor. Access is awful .
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Old 10-10-2017, 07:32 AM   #15
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I've replaced 2 of them on my 2003. Swapped them and sure enough, the code followed the sensor around.
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Old 06-23-2018, 03:39 PM   #16
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I measured cam position 1 and 2 deviations with the Durametric, Cam 1 was steady at 3.22 cam 2 was reading -0.45 and steady. The car is a 2004 Boxster s, there are no engine alarm codes or cel, the car seems to be operating properly. My understanding is these two readings should be close(ER) together. I uninstalled the software re downloaded and reinstalled the software. When checked After this the observed values were the same. If it was a failed sensor I would have assumed there would be error codes or noticeable performance degrade. What have others observed? Thanks Rick
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Old 06-23-2018, 05:51 PM   #17
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Originally Posted by Rickvd View Post
I measured cam position 1 and 2 deviations with the Durametric, Cam 1 was steady at 3.22 cam 2 was reading -0.45 and steady. The car is a 2004 Boxster s, there are no engine alarm codes or cel, the car seems to be operating properly. My understanding is these two readings should be close(ER) together. I uninstalled the software re downloaded and reinstalled the software. When checked After this the observed values were the same. If it was a failed sensor I would have assumed there would be error codes or noticeable performance degrade. What have others observed? Thanks Rick
The deviation spec for the car is +/- 6 degrees.

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