2005 XC90 2.9 ltr awd tr6 high ECM-6140 EXHAUST CAM CONTROL -SLOW

hebhere · Post by **hebhere** » 12 Nov 2018, 15:48

My check engine light comes on. I get on my VIDA ECM-6140 CAMSHAFT CONTROL - SLOW.
Does anyone have any knowledge and advice on this please
2005 Volvo xc90 2.9 TR6 The timing belt is new

We have triple checked the timing

The cam gears are not new
(I am learning a lot here)
This is my first Volvo and I have done most on it. I come here a great deal to learn even more.
Thank you

Post by **SuperHerman** » 13 Nov 2018, 10:19

Your exhaust cam solenoid may be failing and/or dirty. You can take it off, clean it up and any passages you see and replace your oil. Have a new gasket on hand or material to make one. I believe there is a screen on the gasket that traps gunk - this could be your issue.

Post by **ggleavitt** » 13 Nov 2018, 16:42

https://docs.google.com/viewerng/viewer ... f&hl=en_US, https://forums.swedespeed.com/showthrea ... t-or-clean as a start. Procedure above is also in VIDA under the "Bulletins" for Engine.

hebhere · Post by **hebhere** » 13 Nov 2018, 17:55

The Cam Solenoids are new. Thank you.
I Replaced them when I did the Timing Belt

Post by **ggleavitt** » 13 Nov 2018, 19:50

Hub maybe, it's oil pressure controlled by the solenoid controlling the hub position, ECM maps the angle it wants the camshafts to be and reads the sensor on the back as a "loop". Loop is not being completed fast enough and the code is being thrown.

If there's enough oil pressure and the solenoid is new, then maybe the hub is not building internal pressure fast enough to make it twist to the degree the ECM expects. Post I did somewhere with some links on how the hubs work, I'll see if I can find and repost.

Hubs are original but not new? Not clear from the above. Did they get removed for any reason?

Post by **SuperHerman** » 13 Nov 2018, 21:00

I am betting your timing is off. Pretty common with the dual VVT.

Backing up, miles on car? Codes before? What besides the timing belt and solenoids was done? Did you take off either VVT? Why did you do the solenoids? What did the oil and passages looks like?

hebhere · Post by **hebhere** » 14 Nov 2018, 08:31

Replaced Solenoids due to codes which stated they referred to the solenoids.
The VVT Hubs were replaced because the Cam/ cover was replaced. The oil filler neck had become loose and was leaking oil out. This was done when the belt was replaced. When the belt was initially replaced the timing was off. It had to be re-done. The cams were set and locked using the cam lock tools. VVT were removed to set the cams and replace cover I guess. All was redone and rechecked.
The new cover, was able to get a used one, was put in a tank and cleaned prior to installation. The passages were all checked and cleaned.
Miles on car new at 145000.

Codes before yes, many. I have been getting them all cleared. This is the last code to get rid of. I am thinking maybe the exhaust VVT hub??

Thank you for your guidence

hebhere · Post by **hebhere** » 14 Nov 2018, 08:45

In response to ggleavitt:

Hubs are not new. I would have replaced, (most likely should have), but for the cost I guess.
Hubs were taken off and re-installed. The timing was off after replacing the timing belt. Took them off to start over and reset cams to specs using the cam locking tools

It would be so awesome if you could locate those hub links. I would appreciate that immensely

Post by **ggleavitt** » 14 Nov 2018, 11:35

Here are a few links, mostly related to leaking but if you can see significant in/out or rotation or note wobble when the hub is turned, the internals are probably compromised.
viewtopic.php?t=77613#p416042
viewtopic.php?f=9&t=73063
https://volvoforums.com/forum/volvo-xc9 ... ded-81251/
https://1-tube.ru/watch/eWRjFumpzkA

Looks like this inside the hub I believe- https://toyota-club.net/files/faq/16-01 ... _2_eng.htm, https://www.supraforums.com/forum/showt ... -with-pics, sadly our hubs are riveted together versus removable bolts on the Toyota.

Have to be honest, while it's possible to have the timing off far enough to trigger this code, I would have assumed that there might be also be a corresponding reported code for the cam position being too far off. Nevetheless, it's certainly a possibility.

Hubs are kinda expensive, don't want to send you down some $$$ path but based on what you suggest, the next logical place to look in my opinion is there, especially considering mileage and year.

If you can get the car read by something that speaks Volvo codes, it would help to omit any other symptoms.

Description of functionality here (could not separate CVVT from the rest)-

5_6 Cylinder CVVT Function_Plus Volvo.pdf: (480.52 KiB) Downloaded 527 times

11/14/18- fix typo (would)

Post by **SuperHerman** » 14 Nov 2018, 11:57

Additional provided information is helpful. As you had the codes before servicing the car let's skip timing issues for now.

What were the codes before? Was it solely ECM-6140 or did it include the intake side?

A couple of items - in a post you state: "The VVT Hubs were replaced because the Cam/ cover was replaced." I assume you meant the solenoids, not the hubs, were replaced because later you state the Hubs were not replaced.

Related - the cam cover was replaced with a used one? I assume you mean the large aluminum cam cover, not the plastic cover piece based on your description. As the cam cover is usually mated to the head, this repair is worrisome. Over time the head and cam cover wear together based on the original assembled parts. The replacement used cam cover could be the source of your issues. Theory being cam wear on the journals could have created (from the donor engine) tolerances greater than acceptable - leading to oil pressure loss. Cam wear on the current head is not the same as cam wear on the new used cam cover. Generally the head and cam cover are considered married. Not saying this is the issue, but it is something to think about if the VVT Exhuast hub replacement doesn't solve your problems. No way to know as an oil pressure test most likely would be inconclusive as it relates to the exhaust VVT hub. I suppose one could try a thicker oil and see if that makes a difference - no other ideas to address that issue. Save the old cam cover just in case. Hopefully you will not need it.

Moving forward with what you have, your work has been pretty thorough and conclusions support the Exhaust VVT being the fault.

You need to decide how much your time is worth at this point or how many times you want to repeat the process. You can try sourcing a used VVT exhaust hub, the same unit is used in almost every Volvo from 1999-2009 using the 2.3, 2.4, 2.5 and 2.9 engines (check here: https://www.volvopartswebstore.com/prod ... 97786.html ). In the alternative you can just buy a new unit. Final option is to see if replacing the o-ring on the VVT could solve your problem. Looking up the part, I noted the o-ring is offered on Ebay - not sure of anything other than it is being sold. Maybe expand the scope of your search to include Exhaust VVT hub, not Volvo XC90 model specific - as they are all the same it is possible you could find more information.

I am most interested in following your results mainly on the cam cover switch.