Check Engine light comes on (P0346) after Valve Cover gasket replacement (2006 Cayenne S)

[z064ddle]

Long story short, I replaced the valve cover gasket on both sides on my 2006 Cayenne S due to some leaks in the spark plugs holes (noticed that when I was changing out the spark plugs to fix some misfire issue).  The driver side went smooth with no problem.  The passenger side took a little longer due to more things to remove and little tighter space.  After the gasket was replaced, there was a Check Engine Light.  I went out to Autozone and they did a scan for me, it showed a P0346 (Camshaft position sensor 'A' circuit range/performance bank 2)  I removed the camshaft position sensor and inspected it, everything seems to be fine.  I bought a Foxwell NT520 Porsche scanner and cleared the code.  The check engine light came back the next day with the same code P0346.  I bought a new sensor and replaced the old one.  Cleared the code, start engine, but CEL came back on after I rev the engine a few times.

 

The car runs great with no issues.

 

Is there something internal that I could have touched while installing the valve cover?  I know that there is a Camshaft sensor trigger wheel that has some fingers, but I wouldn't think they could bend that easy.  Please let me know if you have any idea what could caused this problem.  I hate to take out the valve cover again, but afraid I may have to in order to inspect the internals.

 

I did a live data test from the NT520 and Camshaft Deviation bank 2 is blank.  It's -2.00 for bank 1.  Looks like it's not reading anything at all.

Edited August 24, 2018 by z064ddle
update vehical info

[Loren]

 

Are you sure you replaced bank 2 and not bank1?

As you sit in the car bank 2 is on the left (drivers) side.

 

What happens if you swap the two sensors? Does the problem stay on the same side? or move?

[z064ddle]

4 minutes ago, Loren said:

 

Are you sure you replaced bank 2 and not bank1?

As you sit in the car bank 2 is on the left (drivers) side.

 

What happens if you swap the two sensors? Does the problem stay on the same side? or move?

 

That could be my issue.  I replaced the sensor on the passenger side.  The CEL came on after I replaced the passenger side valve cover gasket.  Maybe that was just a coincident. Thanks for the tip Loren.  Let me change out the driver side sensor now.

[z064ddle]

I replaced the sensor on the driver's side, but the issue remains.  Car runs great with good acceleration and no noise.  I unplugged driver's side camshaft position sensor connector and it didn't make any difference.  I unplugged the passenger side sensor and car won't start and threw additional code P0348.  Plugged back the 3-wire connector to the sensor for passenger side, car starts fine.

 

Does anyone know how the 2 Cam sensors work together?

 

Thanks....

[z064ddle]

After some further inspection of the old sensor, I do see some scuff marks on the metal part of the senor.  Not sure if the trigger wheel finger is touching it and caused that mark.  Please see photos.

 

I did measured the terminals on the sensor connector of the drivers' side.  It's 6.xx VDC between Red and Black.  It's 11.xx VDC between Red and the 3rd wire.