I am trying to help out with a problem on a 2000 V40. Codes show up as 4 different codes but are really the same pair of codes repeated twice. The codes are:

p0014 exhaust camshaft position timing over advanced bank 1


p0015 exhaust camshaft position timing over retarded bank 1



I am not familiar with this model. Most of my experience has been with rwd models and only very recently with the s70 model( tbelt, secondary air system etc) any suggestions would be appreciated. Thanks in advance.



Dan

Since you have a code for both over and under timing on the same cam (exhaust), the most likely suspect would be a timing belt that is slipping. I don't know all my Volvo engines very well, but the one in my 01 V70 T5 is an interference engine, which means that if the valves get too far out of sync, they can hit the top of the piston, and that will cost major dollars to fix. I would recommend that this be attended to quickly. I would also pay close attention to the tensioner, and would probably replace it as well, since this may be what failed and allowed the belt to slip. Please keep us posted on what you find when you get in there.

Jerry
01 V70 T5

Thanks for the reply. The timing belt was done about 8,000 - 10,000 miles ago by a local indy Volvo specialist. My girlfriend(her college student son's car) bought the car back to the indy for a check engine light on and he gave her a laundry list of repairs that this car needed($$$$$$). She wanted a second opinion and brought it to the local dealer who diagnosed exactly what you and Klaus said. They said the indy put the tbelt on a tooth off and corrected the problem(very reasonably) and reset the check engine light. After about a week of driving the light reilluminated and I pulled the codes that I listed in my earlier post. She is trying to find the laudry list of repairs proposed so that I can look it over. This is a very low mileage car for the year...has about 55000 miles. She seems to remember something about a variable valve timing module that was big bucks in the original estimate. Anyone know about variable valve timing in these models? Again, thanks for any replies,



Dan

Dan,

If the belt is new, and the indy put it on one tooth off, it should stay that way. The setting of the tooth off makes it too advanced, or too retarded, but not both which is what the original post stated! The only plausable explanation for this change is the belt is slipping multiple times, or there is a problem with the varible timing mechanism. I know NOTHING about how the varible timing works or how to trouble shoot it. Perhaps someone else can help. While figuring the varible time is difficult, checking the tensioner should be straight forward. As Klaus suggested, push on the belt and see if there is tension, and that it goes back. The setting on my V70 is this will feel relatively taught. The tensioner on my car is just a spring loaded roller that has a mounting screw slightly off center that allows a person to slightly adjust the tension. If the mounting screw on mine is not torqued down, it could move and allow the tension to decrease, and thus the belt to slip.

I looked up several of the V/S40 models at FCP Groton, and they all show the same mechanical tensioner that I have on my V70, but I didn't look up all the possabilities, as I didn't know the engine size or if it was a turbo or not. So if this tensioner was not torqued correctly when it was installed this may be the issue (cheapest one, and pretty easy to fix), or it has something to do with the mechanics of the varible timing, which is unlikely, but possible.

Please let us know, we'll keep trying to help. BTW, I find it unlikely the car should need extensive work like the indy wanted with only 55K on it, or that he could diagnose the issue to the varible timing mechanism. It is also likely you would have received a similar response from the dealer if this was true. I'd get this solved and then find a new indy!

Jerry
01 V70 T5

P.s. I know nada about the variable timing intricacies myself.



Dan

Hi Checksix,
Ya, I know about the tensioner... just did a tbelt on my daughter's s70 last week. this v40 is my girlfriends son's car. i think she has the receipt from the tbelt change of about a year ago. I agree that the list was waaaaay too long by the indy ... especially when the dealer only thought a tooth off at the tbelt. When I get time I will have a look at the tensioner in the v40 myself. I will post back with results or findings. Thanks for your response.



Dan

Dan,

This is GREAT news to know I'm talking to an experienced wrench turner! So you already know about what the tension sould feel like since you have already done a belt change. Personally I'd put my bet on the tensioner either failing or it was not properly torqued or set. Good LUCK!!!

Jerry
01 V70 T5

Hi checksix,
Still doing detective work on this v40. I have the original receipt that shows tbelt, tensioner and check of idler pulley done on 7/11/07 along with some other stuff like oil change and serp belt. Also has a note that at that time they connected the Volvo scan tool to the v40 and found stored codes. As a result of this they inspected and replaced "camshaft reset valve" which they found to be bad. Funny thing about this is it was a no charge item since it was replaced at a previous service on 10/13/06... less than a year earlier. I am still waiting to get my hands on the copy of the big bux estimate that was done by the indy recently to see about any mention of the variable timing gizmo on this car. Btw, this car has only been driven about 6000 miles since the tbelt/ tensioner install. Sleuthing continues.



Dan

My best guess is still the tensioner even though a new one was installed. Parts do fail, and perhaps the spring on this one broke. An other guess is the tensioner was not torqued properly. As you know, you do torque it lightly to do the setting. Perhaps it wasn't torqued the rest of the way? Please keep us posted!

Jerry
01 V70 T5

Checksix said to check the tensioner. Double that check. The tensioner should have been replaced at the Tbelt change. If you still have the receipt for the Tbelt change, see if it is on there.
Something is making the belt slip. This 4cyl is not that hard to work on and you should be able to just reach down and push the belt and verify that the tensioner snaps right back up.

Sounds like an Indy to avoid???

Klaus
--
Just driving a 1998 V70R :)

Hi again Klaus,

Just posted more info to checksix about v40 if you are still interested.



Thanks,


Dan

Thanks for the reply Klaus. I posted a response to checksix about this too. I will post again when more info surfaces.



Dan

Sounds like someone changed the timing belt and screwed up, or the belt is overdue for a change and has slipped a couple of teeth.

Klaus
--
Just driving a 1998 V70R :)

Hi Klaus,
Please see my reply to checksix.





Thanks,



Dan