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Camshaft Position Sensor Replacement
 
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Pelican Technical Article:

Camshaft Position Sensor Replacement

Jared Fenton

Time:

6 hours6 hrs

Tab:

$120 to $240

Talent:

**

Tools:

E10 Torx socket

Applicable Models:

Porsche 955 Cayenne S (2003-08)
Porsche 955 Cayenne Turbo (2003-08)

Parts Required:

Camshaft Position Sensors

Hot Tip:

Scan the vehicle for fault codes beforehand

Performance Gain:

Smoother running engine

Complementary Modification:

Replace crankshaft position sensor

The camshaft position sensors play an important part in the operation of the fuel injection and ignition systems on the car. They are used to give the vehicle's computer a reference point for the timing of the camshafts. This in turn allows the fuel injection, ignition and Variocam systems to operate correctly.

A failing cam sensor can cause rough running, poor throttle response and in some cases will prevent the engine from running altogether. When a cam sensor fails, it usually triggers a fault code related to the sensor that isn't working correctly. You'll need to use a diagnostic scanner, such as Durametric to read the fault code, determine which side is bad and then determine your next course of action.

Replacing both of the camshaft position sensors is easy, they are held in place with a single E10 Torx bolt. Unfortunately, gaining access to the sensors requires removing the intake manifold. Please see our article on Intake Manifold Removal for more information.

Shown here is the position of both camshaft position sensors (green arrows) towards the rear of the engine.
Figure 1

Shown here is the position of both camshaft position sensors (green arrows) towards the rear of the engine. Note that the procedure for replacing the sensors is the same for both sides.

Left and Right Sides of Engine: Shown here is the E10 Torx bolt holding each cam sensor in place (green arrow).
Figure 2

Left and Right Sides of Engine: Shown here is the E10 Torx bolt holding each cam sensor in place (green arrow). Remove the bolt and carefully pull the sensor out of the cylinder head.

Left and Right Sides of Engine: Pull up on the tab (green arrow) securing the electrical connector to the sensor and pull the connector off.
Figure 3

Left and Right Sides of Engine: Pull up on the tab (green arrow) securing the electrical connector to the sensor and pull the connector off. Now just place the new sensor in the mounting hole, reattach the electrical connector and re-install the Torx bolt.

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Comments and Suggestions:
Grant Comments: I have a 2005 Cayenne S, bought off a car lot. Ran great home. Drove approx. 75 miles interstate. Went to the store, went to start and ran miserably. Was giving P0304 & P0305 error codes. Replaced all 8 coil packs. Then read P0030 and P0050, replaced all 4 oxygen sensors. Now reads P0300 and P0050. Runs much better, but not like it should. Any suggestions would be appreciated.
November 22, 2016
  Followup from the Pelican Staff: p0050 is an o2 heater code, probably a faulty o2 heater. P0300 is a misfire. I would check spark, fuel and compression on all cylinders. - Nick at Pelican Parts  
Meto Comments: hi, i have cayenne 2008 112000 mile and im getting code P12A2 what that mean
Thank you
November 16, 2016
  Followup from the Pelican Staff: Fuel rail pressure sensor fault. - Nick at Pelican Parts  
Gato Comments: 2005 porsche cayenne S. RPM move up/found when stop and when a/c RPM also go up/down any idea need you help
October 11, 2016
  Followup from the Pelican Staff: Could be a vacuum leak or engine misfire. I would start by checking the DME for fault codes. If the system is not working properly, a fault code will be set. This will be your best bet when diagnosing.
- Nick at Pelican Parts
 
NYSparky Comments: This repair can be done without removing the intake manifold, I just did it today after seeing another post from another forum. You still take the air pumps off, engine covers and I took off the air pump bracket. From there, without touching the fuel rails or intake manifold you can change the cam sensors, took me about 1.5 hours
July 9, 2016
  Followup from the Pelican Staff: Thanks for sharing your installation process and experience. These type of comments add so much to the Pelican tech community.
- Nick at Pelican Parts
 
FLYNBUY Comments: Hi, my 2008 Porsche Cayenne has code P0405 come on and off at times and just today code P2293 came on while on the fwy. As I get to 1900 rpm it shutters and I lay off the gas, if I force it the engine light and code P2293 comes back. Any suggestions? Thanks in advance!
July 6, 2016
  Followup from the Pelican Staff: P2293 Fuel - high pressure

Possible fault causes:
- Predelivery quantity or pressure in fuel low pressure circuit too low
- Pressure relief valve in high pressure circuit faulty
- Fuel high pressure sensor faulty
- Quantity control valve faulty (in fuel high pressure pump)
- Fuel high pressure pump faulty
- High pressure injector(s) (fuel injector(s)) faulty - Nick at Pelican Parts
 
Paul Comments: I have a 2004 Cayenne-S and got only P0011 code. I have already replaced the Bank1 Camshaft positioning sensor but still have that code appeared again. Any thought?
June 20, 2016
  Followup from the Pelican Staff: You may have an issue with mechanical camshaft timing. - Nick at Pelican Parts  
bill Comments: I have a2004 porsche cayenne S with P0011 and P0349 what I should do where to start?
April 20, 2016
  Followup from the Pelican Staff: Check the camshaft sensor signal and engine timing. - Nick at Pelican Parts  
PHung vo Comments: 2005 Porsche Cayenne base V6 3.2L base model
Started the car without problem then engine stalled after 5-10 second every time. The scan showing code P2177 and P2179 system too lean off idle bank 1 and bank 2. Is it possible both camshaft position sensor goes bad?
How much does it cost to replace both of them?
Thank you for your advice
April 12, 2016
  Followup from the Pelican Staff: Lean would not be cam sensors. YOu may have an intake leak or faulty maf sensor. - Nick at Pelican Parts  
Zuli Comments: Hi i have 2003 cayenne4.5s 124k miles on clock, topped up engine oil went for drive and it misfired on high and now everytime i start it it just dies after 10 seconds error code is P0011 changed both camshafts sensors still the same. Its not new engine is it?
April 9, 2016
  Followup from the Pelican Staff: It could be a timing chain issue. I would check mechanical engine timing. - Nick at Pelican Parts  
Joe Comments: I have 2008 Cayenne GTS wth about 64K miles. CEL came on with error code P1356 - valve lift control cylinder 5. Engine is a bit rough at idle. All spark plugs and coils have been replaced. What other parts do I need? Thanks.
March 19, 2016
  Followup from the Pelican Staff: That code is for misfire at engine start. I would check spark, fuel and compression on all cylinders.
- Nick at Pelican Parts
 
Iosko Comments: Hi i have problem this is code 16733 and 16728 camshaft problem? Does it have to take two camshaft sensors? car runs 20 seconds and no power crashes and stalls 4.5 340ps
March 4, 2016
  Followup from the Pelican Staff: What vehicle model and year are you working on? - Nick at Pelican Parts  
Mark Comments: Hi,

I have a 2009 Cayenne GTS with 128k miles on it. The check engine light comes on and them will go out for weeks and then return. A scan using a cell phone based application showed the Pcode P000C. My research tells me it can be several things from a loose gas cap to a slow responding Cam position sensor in bank 2. How can I determine the real cause of the light? If it is indeed the cam position sensor any estimate for the cost to replace it?

Thanks for your help.
February 3, 2016
  Followup from the Pelican Staff: I believe that code is for the engine timing. You may want to have it scanned using a Porsche scan tool to be sure you are getting the right code. If the same code comes up, you may have a timing or sensor issue. - Nick at Pelican Parts  
Mike Comments: Hi I have a 2009 Porsche Cayenne base V6. Cel keeps coming but when I bring to dealership it doesn't give them a code. Mind you this my car was recently rear ended so the rear sensors when I back up are always beeping since it was damaged will that set off the cel to turn on??
December 15, 2015
  Followup from the Pelican Staff: No, the back up will not. Only an emission increasing fault will turn on the check engine light. - Nick at Pelican Parts  
aj kreiss Comments: I have a Porsche cayenne 2004 S 4.5 my check engine light came out after a misfire code in cylinder % I fix the problem but a day after check engine light came back I checked the code and gave me P0011 and p0349 my cayenee have 99215 miles what would be the problem and where do I start dealer saying $9800 to fix the problem and other telling me sensor ,,,please advise..
November 23, 2015
  Followup from the Pelican Staff: This could be a camshaft timing issue, or a problem with the camshaft actuator. What did the dealer say you had to replace? - Nick at Pelican Parts  
Kingsley Comments: Hello Sir what might be the cause of my porsche cayenne s 2003.The car do not start after driving it for some time especially when the engine is hot.But when i support it with battery it starts again.When the engine is cool like morning hours it starts normal any help what might be the cause,Thanks
September 19, 2015
  Followup from the Pelican Staff: Could be a faulty sensor or fuel pump. - Nick at Pelican Parts  
kraskata Comments: Hi , I have Cayenne 2 gen about 175k km. I had diagnostic readingnot genuine and appear error code P0021. The possibilities are 3-
1.timing chain stretchor not align
2.Vario cam plus
3.camshaft sensors .
How I can determine which one of those is the real cause.I read a lot, how with scope is possible to see both camshaft are not sync ,but still how can you find the real.Because if you start to eliminate one by one it is not so simple -this mean you car will be at box for a 10-15 days .
With this durametric diagnostic tools will eliminate most of them or not.Any suggest from you side.Thanks
September 5, 2015
  Followup from the Pelican Staff: Using a scope and a known good wave pattern, you can determine is the timing is off from the signals of the camshaft and crankshaft sensors. That is the best way to answer your 3 questions. Unfortunately I do not have a wave pattern to share. - Nick at Pelican Parts  
Porsche gal Comments: I just purchased a 2009 Cayenne and the check engine light comes on from time to time. I had two scans done. Dealer's scan showed two possibilities. They said start with oil change. The light went out and come on three days later. Went off again and a few days later came back on. Second shop scan said to replace Camshaft sensors but German motor shop didn't have the tools and it would cost thousands. Not sure what to believe but need to get it fixed on a limited budget.
August 11, 2015
  Followup from the Pelican Staff: Hard to offer advice without knowing the fault code. Can you get the P-code number? - Nick at Pelican Parts  
GrahamB Comments: Hi

Ihave fault codes P0021 and P0011 on my 2005 Cayenne 4.5s. I thought the fix was these camshaft sensors but when I took it to my Porsche dealer they said the repair was camshaft Actuators. BTW they test drove the car and did diagnostics for free! Please help
July 25, 2015
  Followup from the Pelican Staff: I would go with the dealer's judgement on this and replace the actuators. - Nick at Pelican Parts  
ryzsn Comments: @noel the credit for my p0349 comment down below goes to YOU good sir. sorry! NOEL posted about the possibility of a bent cam phaser after doing valve cover work and saved my day. cheers
July 17, 2015
  Followup from the Pelican Staff: Thanks for the follow up and interaction. We appreciate it.
- Nick at Pelican Parts
 
Kingsley Comments: Please i would like to know the cause of my porsche cayenne s 2003..when i am moving at times it slows down and after sometime picks up again. another thing is that at traffic it stops moving entirely only to move again when i change the gear and bring it back to move position and finally when i want to pedal it jumps by force like it jecks with noise like high gear..waitings for your help .Thanks
July 14, 2015
  Followup from the Pelican Staff: Sounds like the transmission is low on fluid. Have the car checked for leaks and top off the fluid if necessary. - Casey at Pelican Parts  
ryzsn Comments: @irfanbk, brooo...! you saved my ass so hard!! recently resealed a friend's valve covers on their cayenne. piece of cake, nothing to it.. hey where'd that engine light come from?? chased the p0349 code given by durametrics for two days straight, then i saw that the cam phaser can be bent if you don't pay attention to it while fitting the covers. car drove seemingly fine with bank 2 hall sensor not working, but now there was a glaring engine light = re-opened the cover who's bank was complaining, and didn't even see the bent tabs on the cam phaser initially. i had to turn the crank another half revolution to expose them half the phaser has thick tabs which are probably to sturdy to bend. sure enough, there they were just as you mentioned, @irfanbk!! i then, happily and relievingly, carefully bent them back to their 90 degree position without fatiguing and snapping them yikes!! engine light is now gone. with durametrics i went back and cleared the inactive faul and fault memory now stays clear. what an absolute miracle this page and it's contributors are. @irfbank thanks mate!!
July 11, 2015
  Followup from the Pelican Staff: Thanks for the follow up and interaction. We appreciate it.
- Nick at Pelican Parts
 
Cherry Comments: Nick, tanks for the reply. Sorry it's a 2005 cayenne turbo.
March 19, 2015
  Followup from the Pelican Staff: Ok, got it.

My previous comment applies. Check the work that was performed. - Nick at Pelican Parts
 
Cherry Comments: Hello, it's probably an old one but new to me, p0346+p0349?
Recent valve cover repair with no problems for well over 2500 miles. CEL is recent And codes are from a cheap code reader. Sound familiar or have any experience with this one? Car starts runs smooth but might be missing that turbo acceleration till a little higher RPM. Mileage dropped to 9+ from 13+ but not really driving with light on. Anyone Help?
March 17, 2015
  Followup from the Pelican Staff: What vehicle are you working on?

With a camshaft sensor code and recent repair work, check that the sensors are installed properly and the connectors are properly seated. - Nick at Pelican Parts
 
irfanbk Comments: One last thing. Can it be due to timing chain stretching? Should I do the timing or just replace the chain? Its at 185k km.
Thanks.
January 30, 2015
  Followup from the Pelican Staff: That is almost the exact same mileage for a few of these I have seen and none of them required a new chain. This could be caused by chain stretch or deteriorated chain guides but I have not seen that. Be sure to inspect the reluctor wheels closely while in the valve cover, and you may just want to clean out the vario cam solenoids to prevent having to go back in to the valve covers for a while. - Casey at Pelican Parts  
Noel Comments: Finally fixed my problem on 2004 Porsche Cayenne S code p0349.,the problem is the cam phaser rotor was bent due to a valve cover gasket change and I accidentally bent my self and I just straight the bent one.now it's fixed no more problem runs great..thanks.
January 30, 2015
  Followup from the Pelican Staff: Whoa. glad you found it, thanks for the follow up. - Nick at Pelican Parts  
irfanbk Comments: Thanks for quick response. Mine is 2004 Porsche Cayenne Turbo. I found the manuals and timing procedure yesterday.
Before getting into that, there are two possibilities. First is that there's been a mechanical slip between the sprocket and camshaft. Second is that one of the Cam Adjusters Solenoid is sluggish/stuck due to bad oil changes. Which one has more probability?
January 30, 2015
  Followup from the Pelican Staff: Definitely in my experience the slippage is more common. The sluggish movement due to oil supply or contamination is typically a P0011 - Casey at Pelican Parts  
irfanbk Comments: I have the same code p0349. Cam sensor was replaced, cam sensors were switched, valve cover was removed and reluctor checked, wiring checked, today I used oscilloscope to check if Bank 2 sensor is missing any beats compared to Bank 1 sensor. All to no avail, everything is fine. I did find a minor delay between the reading of two sensors. I read on a forum there are NO keys between the timing gear sprockets and camshafts. Is there anyway to correct it?
January 29, 2015
  Followup from the Pelican Staff: What is the year and model of your Cayenne??

Here is a link to show what tools are necessary to properly check and or set the cam timing on 2004-2006 Cayenne S.

MAKE SURE TO REPLACE ALL 4 CAMSHAFT BOLTS after setting the timing.

http://workshop-manuals.com/porsche/cayenne_titanium_%289pa%29/v8-4.5l /engine_cooling_and_exhaust/engine/camshaft_lifters_and_push_rods/camshaft_engine/component_information/service_and_repair/removal_and_replacement/page_1898/ - Casey at Pelican Parts
 
Noel Comments: That's what it said p0349 camshaft position sensor intermittent and what it's that mean.,thanks a lot nick for reply..
January 6, 2015
  Followup from the Pelican Staff: It means just that, The signal from the sensor to the DME is intermittent. Not always there.

You may need to check the engine timing. See this video for the scope pattern: https://www.youtube.com/watch?x-yt-ts=1422579428&x-yt-cl=85114404&v=k3i9A60KJZ4

If your timing is off, you will have to reset it with the timing tool set.- Nick at Pelican Parts
 
noel Comments: thanks for reply.,i did cheack the plug and wiring harness both fine have a signal and change the camshaft sensor still not luck,.check engine keep coming back p0349 after two start..any suggestions thanks alot
January 5, 2015
  Followup from the Pelican Staff: What is the signal, did you measure it at the DME? Not much else can set this code. It can be intermittent. - Nick at Pelican Parts  
Noel Comments: I have a 2004 Porsche cayenne 4.5l v8 and I already have to change the valve cover gasket after I change check engine came on at p0349 camp shaft position sensor and I don't know why did I do wrong and pls let me know what parts do I have to change thanks.
December 28, 2014
  Followup from the Pelican Staff: Check if the sensor is plugged in correctly or damaged. - Nick at Pelican Parts  

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