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#2038888 - 10/06/10 06:03 PM Synthetic oil causes a camshaft sensor to go bad?
dkryan Offline


Registered: 04/11/03
Posts: 2011
Loc: Cincinnati
My friend had a CEL illuminate on her well-maintained 2006 Hyundai Sonata 3.3L the other day.

She took it to a Hyundai dealer she trusted (I've been to that shop previously and the service department came off as being customer oriented and knowledgeable. Surprise, I know) and they read the code as a camshaft sensor problem.

They mentioned she had over 4k miles since her last oil change and she told them she was using a full syn (Platinum 5w-20) for 7k mile OCIs.

While she did not tell them the viscosity or brand, just that it was a full syn, they replied it could be the oil that caused the camshaft sensor problem.

I had a good laugh when I heard that. I hope she got that in writing so SOPUS can laugh, too.

That Sonata has 43k miles on it. The oil filter used each OCI is an OEM filter.


Edited by dkryan (10/06/10 06:05 PM)
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#2038890 - 10/06/10 06:07 PM Re: Synthetic oil causes a camshaft sensor to go b [Re: dkryan]
Johnny Offline


Registered: 05/27/02
Posts: 14013
Loc: Retired | Wausau, WI
Sounds like they just might not be knowledgeable when it comes to oil.

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#2038892 - 10/06/10 06:11 PM Re: Synthetic oil causes a camshaft sensor to go b [Re: Johnny]
d00df00d Online   content


Registered: 10/20/05
Posts: 10652
Loc: PA
Originally Posted By: Johnny
Sounds like they just might not be knowledgeable when it comes to oil.

Agreed. Also sounds like a freak coincidence.
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#2038894 - 10/06/10 06:17 PM Re: Synthetic oil causes a camshaft sensor to go b [Re: dkryan]
dkryan Offline


Registered: 04/11/03
Posts: 2011
Loc: Cincinnati
Well, lemme follow-up by asking what WOULD cause a camshaft sensor problem?

I've heard of camshaft problems, but not sensor problems.
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#2038896 - 10/06/10 06:18 PM Re: Synthetic oil causes a camshaft sensor to go b [Re: dkryan]
Spazdog Offline


Registered: 09/06/10
Posts: 5941
Loc: Arlington
If you had mentioned Pennzoil, I bet you would have gotten the old "wax story".

Dealer techs aggravate me so much sometimes.

"Oh, you have this aftermarket part...this caused the part (that has a widespread history of premature failure) to fail." (even though it is completely unrelated)

When you find a good dealer tech, stick with them.
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#2038905 - 10/06/10 06:24 PM Re: Synthetic oil causes a camshaft sensor to go bad? [Re: dkryan]
tinmanSC Offline


Registered: 09/07/10
Posts: 2231
Loc: Oswego, IL
Wow. That's a first.
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#2038916 - 10/06/10 06:43 PM Re: Synthetic oil causes a camshaft sensor to go b [Re: dkryan]
MrBeachcomber Offline


Registered: 02/25/09
Posts: 128
Loc: Virginia Beach, VA
Originally Posted By: dkryan
Well, lemme follow-up by asking what WOULD cause a camshaft sensor problem?...

The only camshaft sensor failures that I've seen have been related to engine heat cycling over time in high mileage cars. The wiring gets brittle and soon the sensor throws a code. In V-8 or V-6 engines, if one sensor fails, I replace both sensors as a precaution.

Overall, I found that most of them are very reliable with no sudden total failures. Even the ones that throw the codes function well enough to keep the engine running smoothly enough to avoid the "walk home" engine mode of operation.

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#2038919 - 10/06/10 06:46 PM Re: Synthetic oil causes a camshaft sensor to go b [Re: dkryan]
dparm Offline


Registered: 04/19/10
Posts: 13096
Loc: Chicago, IL
Unrelated to the oil.
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#2038938 - 10/06/10 07:12 PM Re: Synthetic oil causes a camshaft sensor to go b [Re: dkryan]
JHZR2 Offline



Registered: 12/14/02
Posts: 39869
Loc: New Jersey
Maybe it was made with some REALLY cheap materials? It is a Hyundai after all.

Jk kind of...

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#2039027 - 10/06/10 08:47 PM Re: Synthetic oil causes a camshaft sensor to go b [Re: dkryan]
dkryan Offline


Registered: 04/11/03
Posts: 2011
Loc: Cincinnati
Now JHZR2,

My friend's Sonata and the camshaft sensor lasted longer than the tranny seals in my 2002 Saab 9-3 SE.

Her engine threw a CEL. There is no final word on whether the camshaft sensor was actually faulty.

Unlike that left side tranny seal on the Saab 5-speed manual that threw lube all over the housing at 28k miles. Sure, the seals were replaced under warranty with no cost to me, but with Saab's "Born from Jets" advertising slogan, I began to search in earnest for the Martin-Baker ejection seat handle!

And to think I worried about the DIC in that Saab.
_________________________
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#2039051 - 10/06/10 09:16 PM Re: Synthetic oil causes a camshaft sensor to go b [Re: dkryan]
JHZR2 Offline



Registered: 12/14/02
Posts: 39869
Loc: New Jersey
Hey, I cant help it if both were faulty. Every manufacturer has a lemon now and again.

My mother's cam sensor started leaking heavily. it was just a piece of plastic with an o-ring really, everything was encapsulated/potted in plastics/resins/epoxies... Which was why I made the comment - still marginally kidding about it - because a poorly selected material COULD have some level of chemical compatibility - and hot oil, syn or not, could have caused it to degrade to the point where it was bad.

Granted, then Id think it would be a more widespread thing, but all the same, it could be a possibiity.

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#2039165 - 10/07/10 12:12 AM Re: Synthetic oil causes a camshaft sensor to go b [Re: dkryan]
FZ1 Offline


Registered: 02/07/08
Posts: 4418
Loc: Texas
Warranty avoidance maneuver.

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#2039248 - 10/07/10 06:51 AM Re: Synthetic oil causes a camshaft sensor to go b [Re: FZ1]
dkryan Offline


Registered: 04/11/03
Posts: 2011
Loc: Cincinnati
Originally Posted By: FZ1
Warranty avoidance maneuver.

The car has a basic 6 year/60k mile warranty on everything, plus 10 years/100k miles on the powertrain. At 43k miles, it would be tough for the dealer to avoid warranty work.

Originally Posted By: JHZR2
Granted, then Id think it would be a more widespread thing, but all the same, it could be a possibiity.

Yeah, it could be the quality of the sensor itself as opposed to an actual engine problem. The service manager said he has had to replace c/s sensors on Sonatas. However, the engines were of a different displacement, they had much higher mileage on the engine(s), and he said the owners used dino oil and went well past the recommended OCI for that engine.

Nope, he did not say what dino oil was used nor the actual OCI for those engines.
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#2039312 - 10/07/10 08:20 AM Re: Synthetic oil causes a camshaft sensor to go b [Re: dkryan]
Kestas Offline



Registered: 06/04/02
Posts: 11732
Loc: The Motor City
Did a new sensor fix the problem?

I had experience with my Ford ZX2 throwing a cam sensor code. It turns out the heavy oil I was using made the VCT (variable cam timing) solenoid act sluggish.

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#2039753 - 10/07/10 05:20 PM Re: Synthetic oil causes a camshaft sensor to go b [Re: dkryan]
dkryan Offline


Registered: 04/11/03
Posts: 2011
Loc: Cincinnati
No new sensor.

The service department re-set the CEL and drove it for 15-20 miles with no new CEL illumination.

They told her to return if the CEL illuminated and if the code was the same, they'd change the sensor.

She uses Platinum 5w-20, which is the viscosity spec'd for the engine.
_________________________
2014 Nissan Altima 2.5 SL
Amsoil 5w-20 SSO
Fram Ultra

2005 Toyota Highlander
Amsoil 5w-30 SSO
Fram Ultra filter

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