2014 XC60 has started to "stutter" in low revs.

[Paul230164]

Hi Guys. I hope some clever soul here can shed some light on a problem that has recently developed on our 2014 XC60 2.0l Diesel FWD183.

As I gently accelerate from standing start, it seems to momentarily loose power and the car judders a little. This happens repeatidly until the car is quick enough to change to 3rd. Its prevalent in 1st and second gears. It's not noticeable if you hard accelerate from standing and it seems to pull really well like this.

I have completed some standard changes. I first changed the diesel filter and though the car seemed to increase performance slightly, it did not stop this symptom. I have changed the air filter and cleaned MAF sensor.

I have also used VDASH to check for faults and none were reported. I also asked a mechanic friend to check codes on a Snap On scanner and again, it came up clean. There is also on occassion a "Low Engine Performance " warning on the dash.

It feels to me as though it may be fuel or air starvation or perhaps a cracked intake pipe but basic inspection did not show this.

I am beginning to worry that its something sinister so any help would be hugely appreciated.

Thanks guys

Paul

[rxtian]

Can Vdash show live data? If it can, try a drive while displaying the target EGR position, actual EGR position, and EGR error. I’ve caught mine hesitating when the EGR appears to overshoot - effectively momentarily choking the engine. It’s rare and momentary at the moment but I’m planning to clean the valve to hopefully stop it soon.

[Paul230164]

Originally Posted by rxtian

Can Vdash show live data? If it can, try a drive while displaying the target EGR position, actual EGR position, and EGR error. I’ve caught mine hesitating when the EGR appears to overshoot - effectively momentarily choking the engine. It’s rare and momentary at the moment but I’m planning to clean the valve to hopefully stop it soon.

I will check this tomorrow but if VDASH does not, what obdc are you using please? Thanks man for the suggestion

[rxtian]

It’s an iPhone app called Car Scanner:
https://apps.apple.com/gb/app/car-sc...2/id1259933623

The adaptor I got doesn’t seem available anymore, it was called ELM327 Viecar. The app description has recommended adaptors listed.

[Paul230164]

Originally Posted by rxtian

It’s an iPhone app called Car Scanner:
https://apps.apple.com/gb/app/car-sc...2/id1259933623

The adaptor I got doesn’t seem available anymore, it was called ELM327 Viecar. The app description has recommended adaptors listed.

Thanks man. I do have a notable change. I ran vdash again today basically to check if live data is available. I ran code check and found this:

ECM-P00BC00 Mass or Volume Air Flow A Circuit Range/Performance - Air Flow Too Low. General Failure
Information. No sub type information.

At least its a clue. I will investigate more but not sure my knowledge is good enough but it seems 1. Leaking manifold gasket 2. Faulty MAF sensor 3. A vacuum leak.

[V60white]

Originally Posted by Paul230164

Thanks man. I do have a notable change. I ran vdash again today basically to check if live data is available. I ran code check and found this:

ECM-P00BC00 Mass or Volume Air Flow A Circuit Range/Performance - Air Flow Too Low. General Failure
Information. No sub type information.

At least its a clue. I will investigate more but not sure my knowledge is good enough but it seems 1. Leaking manifold gasket 2. Faulty MAF sensor 3. A vacuum leak.

My 2013 V60 had this code...turned out to be the intercooler to throttle pipe had a split in it.
Produced occasional hesitation followed by turbo shutdown at 2500rpm.
I could reset the codes and drive it no problem upto 2500 rpm,,,as soon as it asked for more boost it coughed and gave up, I suspect the split actually closed at low rpm but under boost opened up.

https://i.postimg.cc/MK5TgkrH/20240312-123335.jpg

[rxtian]

I think EGR leaking could cause this as exhaust leaks into the intake instead of fresh air through the MAF…?

[Paul230164]

Finally I got my Vida working with this car. I ran DTC trace and found several faults, most of which refered to a door lock position.

I had no ECM faults.

So I cleared the faults and drove to work in the hope new faults pertaining to this stutter would show.

I did get 2 new faults: 1 Software incompatibility 2. Unknown fault

I have attached the pdfs from vida and ask anyone who can to shed some light on these. Could it be the previous owner remapped it?

I am going to use the weekend to remove the EGR and clean it properly. There is actually a great youtube video on this so will have a pop at it to see if this can help.

Thanks again for any help

Paul

[rxtian]

Looks similar to the issues in this thread mate:
https://www.volvoforums.org.uk/showt...php?p=2903516&

Exhaust manifold pressure sensor maybe?

Seems like it’s usually that or the EGR with this engine!

[Paul230164]

Originally Posted by rxtian

Looks similar to the issues in this thread mate:
https://www.volvoforums.org.uk/showt...php?p=2903516&

Exhaust manifold pressure sensor maybe?

Seems like it’s usually that or the EGR with this engine!

Thanks for your continued support mate and for the link. I have read with interest but the only common I see there is the "unknown". Our car has none of the other fault codes nor do we have an engine management light on. We do still get the Reduced Engine Performance though.

I will of course take a look at this sensor to see if i can remove it and to check its condition. I have no idea where to find this pressure sensor but will research its location. This weekend is dedicated to EGR removal and clean