So i recently purchased my 2001 V70 2.4t from an auction with 129000 miles. The timing belt and water pump was replaced 9000 miles ago. The car drives and shifts great except for when i am at a stop it will pop out of drive with my foot on the brakes. I tested this by leaving the car on a slight incline (so much so that i wouldnt roll into the house or street when i took my foot off the brake in drive) and noticed no fluctuation or popping out of drive to neutral. HOWEVER, the second i push the brake the car starts to idle irraticaly and i release the brake only to roll back half a foot before i pop into drive. The car will not pop out of gear if i lower the automatic transmission all the way to the L selection (1st gear) or in Reverse. In 3,4 or D it will do this annoying popping out of gear with foot on the brake.

I replaced the camshaft position sensor which is what both codes lead me to. I also cleaned the VVT valve and/or the camshaft reset valve (which both codes also allude to) with no results.

Through my search in the interweb, the park neutral switch is a potential suspect of an issue like this. However, when i have my gf sit in the seat to put it in and out of drive, whenever the car pops out of drive, the pnp level/gear does not move. The symptom that does lead to this part is sometimes when i start the car it lurches forward slightly.

The transmission fluid level is perfect but could be replaced. It is not black but is not pink either.

The Volvo dealer when they do a transmission flush tend to re-flash the transmission ecu. Could this be a simple flush and re-flash ecu? Am i looking at a new PNP sensor/lever. Vacuum leak?

To me it seems likes something is not responding electrically because if it was vacuum from the booster, i would do it whenever i pushed the brakes in any gear.

Thanks in advance!

 

when I had problems with my gearbox I found that I got better results at a gearbox specialist - the dealers software will diagnose that there is something not right but wont go into the same detail as the gearbox specialist - It's like buying a general ODBII reader compared to VIDA (the dealer wants to sell you services or a new box - not fix a gearbox).

Hope that helps,
P.

 

Did you ever get this fixed? I'm having the excact same problem and i haven't found a solution..

 

The original post was nearly 20 months ago. I don't think you'll ever hear from him again.
Check your motor mounts as the fierce wobbling he mentioned could possibly effect the PNP switch.
I'd also make sure the 2 bolts which fasten the shifting cable to the transmission housing are secure.

 

I have replaced all of my engine mounts a few months ago, so there should be no problem with them.
Do you have any information about where i can check the bolts connecting the cable? Is it hard to do?
I could not find any information on the Internet..

 

There is a Softwareupdate avaliable at Volvo, the so called AutomaticNeutral Function will be disabeld with this Update, did it on my 2002 V70 Autotrans.
Costs me only around 70EUR at Volvo.

 

Well i already had this update dont at my local dealer. Didn’t change anything. But it feels like it engages the gear a little. Car wants to move and it moves a few cm’s but there is no more power. Then when i switch to L i can drive.