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 FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)

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LARRY70GS
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Mon Jun 25, 2012 10:15 am

gmann3001 wrote:
WOW I feel like a jack ass. my SES light has been on and off for the past year.
I bought the kit online for using my lap top to read the codes...
long story short it didn't work. so after several attempts on ebay
I finally landed an Actron CP9185 auto scanner. and after doing
the coolant drain, flush, water pump and thermostat then refill.
I got to read the Manuel then tried it out... Now I read the posts
about doing the water pump and while its all apart go ahead and
change the camshaft position sensor. but I figured hell if it aint broke don't fix it
right.... well here it comes! are you ready? The scanner said code p0341
the camshaft position sensor fault. Damn am I a Jack Ass! I should have
just changed it when it was all apart! but no! I had to learn the hard way... clap


Well, before you beat yourself up too much, have a look at this thread.

http://rivperformance.editboard.com/t4703p180-p0341-camshaft-position-sensor-cam-sensor-timing-chain?highlight=camshaft+position+sensor

There have been several of us who have had the same wire at the firewall connector break, and that is all it is. It is most likely not the sensor itself. I had that same code on and off for about a month. Finally found the wire broken internally right where it is pictured in that thread. Good luck.

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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AA
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PostSubject: temp   Mon Jun 25, 2012 10:44 am

Recently had my engine rebuilt, decided to keep the original cam and crankshaft position sensors. They seem to be doing their jobs just fine so far. Ain't broke, don't fix it. But since you have the code, definately something's up. Check the wiring as Larry said, maybe that's all it is.

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'98 SC Riviera • 268k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
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gmann3001
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Mon Jun 25, 2012 7:08 pm

LARRY70GS wrote:
gmann3001 wrote:
WOW I feel like a jack ass. my SES light has been on and off for the past year.
I bought the kit online for using my lap top to read the codes...
long story short it didn't work. so after several attempts on ebay
I finally landed an Actron CP9185 auto scanner. and after doing
the coolant drain, flush, water pump and thermostat then refill.
I got to read the Manuel then tried it out... Now I read the posts
about doing the water pump and while its all apart go ahead and
change the camshaft position sensor. but I figured hell if it aint broke don't fix it
right.... well here it comes! are you ready? The scanner said code p0341
the camshaft position sensor fault. Damn am I a Jack Ass! I should have
just changed it when it was all apart! but no! I had to learn the hard way... clap


Well, before you beat yourself up too much, have a look at this thread.

http://rivperformance.editboard.com/t4703p180-p0341-camshaft-position-sensor-cam-sensor-timing-chain?highlight=camshaft+position+sensor

There have been several of us who have had the same wire at the firewall connector break, and that is all it is. It is most likely not the sensor itself. I had that same code on and off for about a month. Finally found the wire broken internally right where it is pictured in that thread. Good luck.



Changed the sensor yesterday, cleared the codes. all checked out fine. now today the SES is
on again... I guess Ill check that wiring harness now... where do i get my hands on that clip with the
rubber gasket? if needed frown
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LARRY70GS
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Mon Jun 25, 2012 8:52 pm

gmann3001 wrote:
LARRY70GS wrote:
gmann3001 wrote:
WOW I feel like a jack ass. my SES light has been on and off for the past year.
I bought the kit online for using my lap top to read the codes...
long story short it didn't work. so after several attempts on ebay
I finally landed an Actron CP9185 auto scanner. and after doing
the coolant drain, flush, water pump and thermostat then refill.
I got to read the Manuel then tried it out... Now I read the posts
about doing the water pump and while its all apart go ahead and
change the camshaft position sensor. but I figured hell if it aint broke don't fix it
right.... well here it comes! are you ready? The scanner said code p0341
the camshaft position sensor fault. Damn am I a Jack Ass! I should have
just changed it when it was all apart! but no! I had to learn the hard way... clap


Well, before you beat yourself up too much, have a look at this thread.

http://rivperformance.editboard.com/t4703p180-p0341-camshaft-position-sensor-cam-sensor-timing-chain?highlight=camshaft+position+sensor

There have been several of us who have had the same wire at the firewall connector break, and that is all it is. It is most likely not the sensor itself. I had that same code on and off for about a month. Finally found the wire broken internally right where it is pictured in that thread. Good luck.



Changed the sensor yesterday, cleared the codes. all checked out fine. now today the SES is
on again... I guess Ill check that wiring harness now... where do i get my hands on that clip with the
rubber gasket? if needed frown

Not sure. My friend had a whole box of them, and a tool to back it out of the firewall connector. I think you will be able to reuse the one you have, including the rubber seal.

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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gmann3001
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Tue Jun 26, 2012 8:22 pm

I hope so... with all the broken wires in the door I can only guess that damn
wire is broken rolleyes
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gmann3001
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Tue Jun 26, 2012 8:28 pm

By the way, how do I disconnect that wiring harness? cant see to well in there... is there
an nut or bolt... or is it just clipped on? scratch
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LARRY70GS
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Wed Jun 27, 2012 8:47 am

There is a front plastic cover that simply clips on. Then dead center is a small bolt (counter sunk in the hole) It's small, 10mm or smaller, I forget. Then the front half comes apart from the rear.

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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gmann3001
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Wed Jun 27, 2012 3:34 pm

Well I got that apart... but cant find any broken wires???
Has any one had a problem with that sensor... at the sensor
end connector? scratch
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LARRY70GS
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Wed Jun 27, 2012 3:48 pm

gmann3001 wrote:
Well I got that apart... but cant find any broken wires???
Has any one had a problem with that sensor... at the sensor
end connector? scratch

Mine didn't look broken either, but I could watch the cam sensor signal go in and out (on the Genesis Tech2 scan tool) as I wiggled that black wire.

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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gmann3001
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Wed Jun 27, 2012 8:17 pm

I Guess Ill try that tomorrow...
Every thing looks nice and secure?
although when I got it all back together
the light was off again...
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Wed Feb 13, 2013 7:23 am

Like to give a big thanks to you guys. Was looking to buy a 98 with a cam sensor code. Bought it and took a couple minutes when we got home and found the broken wire. I was able to get the stuff from work and fixed it for free. Now the wife has a car i trust.
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Fri Jun 28, 2013 9:52 pm

would this wiring issue apply to the 1990 as well? i have the service engine soon light on with 53k and the scan showed this to be the issue-just wanted to be sure this wiring issue isn't the problem before replacing the sensor. thanks.
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Sun Jun 30, 2013 9:38 pm

jayeli wrote:
would this wiring issue apply to the 1990 as well? i have the service engine soon light on with 53k and the scan showed this to be the issue-just wanted to be sure this wiring issue isn't the problem before replacing the sensor. thanks.

It might. It's worth looking at the wiring before you replace the sensor, just to be sure. Remember that your wire harness is 23 years old now...
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Sun Jun 30, 2013 10:33 pm

well i replaced the sensor and the light is still on. but the pics in this topic look different on my 90 3800...i guess i'll read through it again and see if i can figure anything out-thanks.
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Mon Jul 01, 2013 12:53 am

jayeli wrote:
well i replaced the sensor and the light is still on. but the pics in this topic look different on my 90 3800...i guess i'll read through it again and see if i can figure anything out-thanks.

were you told to check the wiring before replacing the sensor... ?

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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Mon Jul 01, 2013 4:22 pm

no i replaced the sensor first-i'm checking the wires tomorrow. if i find a bad wire, i'll just put the old sensor back on then return the new one. but i wasn't sure the wire problem applies to the previous generation 3800 that i have-1990-everyone on this topic seemed to only talk about the last generation with the 3800 series 2.
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Tue Nov 03, 2015 6:54 pm

I have had the P0341 for 6 months now. I got it maybe a month after doing the water pump. This is what i have done so far. Tried two different cam sensor and different ignition coils from the junk yard. Changed all new spark plugs. Check spark plug wires. Check the wiring at the firewall for any broken wires. Rotated the fly wheel to see if the magnet is still there and it is. I have to smog check in 3 weeks. What else can i do?
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Wed Nov 04, 2015 8:43 am

brettfavreisamonster wrote:
I have had the P0341 for 6 months now. I got it maybe a month after doing the water pump. This is what i have done so far. Tried two different cam sensor and different ignition coils from the junk yard. Changed all new spark plugs. Check spark plug wires. Check the wiring at the firewall for any broken wires. Rotated the fly wheel to see if the magnet is still there and it is. I have to smog check in 3 weeks. What else can i do?


I bet that wire at the firewall is your problem.  It can look OK from the outside, but inside, it's bad.  Find some one with a Tech2 type scan tool.  You can monitor the cam sensor signal with that tool.  That is what I did, and when we wiggled the wire, you could see the the signal drop out.

Here is a cut and paste of my previous post,

LARRY70GS wrote:
Well, I replaced both my cam sensor and crank sensors while doing other work on my Riviera.  I cleared the codes and sure enough, the next day, the SES light was on again.  I pulled the cover off the wiring connector and moved the wires around, but it was getting dark and I couldn't see anything.  The next day, the light went off and stayed off for more than a week.  Took a ride up to one of my Buick friends in Connecticut yesterday.  He has a Tech 2 type scan tool that we hooked up.



After hooking it up.  We were able to monitor the cam sensor signal with the engine running.  While moving the wires around, I watched the display turn from yes to no, then back to yes again.  I knew it was the same problem documented in this thread.

We shut the engine down, removed the front half of the harness connector.  I located the black wire and it looked intact.  Pulled on it a bit, and sure enough, it broke right off.






The front half of the harness connector has a sort of locking mechanism for the individual terminals.   Its a white tab visible in the second picture.  If you pull that out a bit, the individual terminals can easily be pushed out of the connector.  Each one has a small weather seal.



My friend happened to have a box full of these new, so we hooked up a small section of black wire, soldered the new connector on, inserted it back into the front block, and soldered it to the feed wire.



Buttoned everything back together, started the engine, and checked the signal.  It was there.  Another problem solved.  This Riviera bulletin board rocks thumbsup   Saved me a lot of aggravation and work.

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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PostSubject: You guys are geniuses   Fri Nov 11, 2016 7:22 am

OK, my check engine light came on in my 98 Riviera 236,000 miles. I have had some stalling issues for a few months that I thought I had resolved with a new IAC sensor. Code P0341 cam position sensor, installed a new one, still set the code. Magnet looked perfect, no play in timing chain. So I read through some of this thread and was about to replace the camshaft sensor magnet because I thought it lost most of its magnetic strength. I reread all 9 pages of this thread which took a while and saw the last part about the mysterious black wire in the corner of the junction block at the firewall. I really did not want to remove the engine front cover and thought I would rule out the wire issue so I removed the junction block, looked at the corner wire, no problems, wire was intact. Flipped it around to the other side and sure enough, the black corner wire was broken off. Soldered in a jumper wire and reassembled and the problem is fixed!

Just wanted to say you guys are geniuses, thank you!
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PostSubject: Re: FAQ: P0341 Camshaft Position Sensor (Cam Sensor / Timing Chain)   Fri Nov 11, 2016 8:02 am

Yay! A fellow "Macombian"! joy

Welcome to the site hi

Now go introduce yourself in the "Welcome" section twak
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