V70: Electrical No OBD power, weird combination of faults

[V70D3]

2015 Volvo V70 2.0 D3 Business with 119k

So, after a recent service and MOT I brought the car back home and saw a low battery warning on the dash, and by the time I got home (about 4 miles from the garage) there was a low oil warning as well. I paused on the way home to have the battery tested, and it came back OK but low (60%) charge.

I connected my Mucar CS90 OBD reader which has worked flawlessly on this car for the last year and a bunch of codes popped up:

P004900 Turbo overspeed
P245868 DPF duration failure
P029900 Turbo underboost
P046C85 Exhaust gas recirculation sensor signal above allowable range
P003A85 Turbo boost control A position exceeded learning limit

I disconnected the battery and put it on charge overnight, then hooked it back up in the car, put 1.5 litres of oil in, ran for a minute to slightly warm up then left to cool for 15 minutes and checked the oil level, but it didn't register any difference.

When I plugged the OBD reader in I got nothing at all, but it works fine on my Skoda Kodiaq and Land Rover Freelander 2.

So, as of now, I have no power to the OBD port in the Volvo and therefore no means of clearing codes, forcing a DPF regen if required, etc

The digital oil level display hasn't moved despite adding more oil and I don't want to put any more in, in case I end up overfilling. For all I know I may have already overfilled - why they deleted the dipstick is beyond me...

I have no idea where my voltage meter is at the moment to check the voltage on the OBD port pins - does anyone happen to know which fuse might be involved, and where it lives ?

In summary, no power to the OBD port, the car can't recognise additional oil (I've checked and there are no leaks), Stop/Start is unavailable despite a fully charged stop/start battery being installed, and so on and so forth.

Thanks for reading - thoughts appreciated.

[FreshAir]

I'd be checking the oil level using the technicians dipstick that is in the car before anything else. Does not answer why no power to OBD port but 1.5 litres is a lot of oil to add in one go.

[V70D3]

Thanks for the suggestion.

The rationale behind adding 1.5 litres was that the digital oil level was reading below the lowest mark, so I hoped it would at least start nudging half way. Instead it remained stubbornly fixed at the same low level . Over the last couple of hours I've checked it several times - my understanding is that it takes around 20 minutes for the digital oil level to refresh after adding/removing.

[Simmy]

Originally Posted by V70D3

2015 Volvo V70 2.0 D3 Business with 119k

So, after a recent service and MOT I brought the car back home and saw a low battery warning on the dash, and by the time I got home (about 4 miles from the garage) there was a low oil warning as well. I paused on the way home to have the battery tested, and it came back OK but low (60%) charge.

I connected my Mucar CS90 OBD reader which has worked flawlessly on this car for the last year and a bunch of codes popped up:

P004900 Turbo overspeed
P245868 DPF duration failure
P029900 Turbo underboost
P046C85 Exhaust gas recirculation sensor signal above allowable range
P003A85 Turbo boost control A position exceeded learning limit

I disconnected the battery and put it on charge overnight, then hooked it back up in the car, put 1.5 litres of oil in, ran for a minute to slightly warm up then left to cool for 15 minutes and checked the oil level, but it didn't register any difference.

When I plugged the OBD reader in I got nothing at all, but it works fine on my Skoda Kodiaq and Land Rover Freelander 2.

So, as of now, I have no power to the OBD port in the Volvo and therefore no means of clearing codes, forcing a DPF regen if required, etc

The digital oil level display hasn't moved despite adding more oil and I don't want to put any more in, in case I end up overfilling. For all I know I may have already overfilled - why they deleted the dipstick is beyond me...

I have no idea where my voltage meter is at the moment to check the voltage on the OBD port pins - does anyone happen to know which fuse might be involved, and where it lives ?

In summary, no power to the OBD port, the car can't recognise additional oil (I've checked and there are no leaks), Stop/Start is unavailable despite a fully charged stop/start battery being installed, and so on and so forth.

Thanks for reading - thoughts appreciated.

check fuse for the obd port

[FreshAir]

Fuse 16 on my 2014 MY V70 D3. Page 389 of the manual.

That is in fuses behind glovebox. There are 2 fuse/relay boxes, it's the right hand wider one.

There are 3 vertical banks of fuses - shown as bottom one of middle bank for OBD and alarm (alarm unit can have issues so fuse could potentially blow). 5A fuse.

[V70D3]

Originally Posted by FreshAir

Fuse 16 on my 2014 MY V70 D3. Page 389 of the manual.

That is in fuses behind glovebox. There are 2 fuse/relay boxes, it's the right hand wider one.

There are 3 vertical banks of fuses - shown as bottom one of middle bank for OBD and alarm (alarm unit can have issues so fuse could potentially blow). 5A fuse.

Thanks for that

One 5A fuse later and I'm back in the land of the living and I've cleared the fault codes. I ran the car on idle for a couple of minutes and I will go out again later today and see if I can get a proper oil level reading. It was still showing almost empty on the digital display before I ran the car.

Oddly, it still says stop/start unavailable. The only other anomaly that popped up was "Alarm system Malfunction Service required" which I've not seen on this car before.

Assuming I can get an OK oil level I will take the car for a decent run tonight or tomorrow and check OBD again to see if anything has popped back up.

Tune in later for another exciting episode...

[ShadeTek]

The stop/start will come back when the battery is charged up. Alarm system error is possibly due to its internal battery going flat. I would be having a word with whoever serviced your car to see what they did to it?

[FreshAir]

Your code reader can also show the battery state of charge as the ECU sees it.

Mine is not keen to charge the battery so much so stop start isn't often available although that doesn't bother me as I normally turn it off anyway.

[V70D3]

Minor update.

I dropped the oil today only to find about 2 litres in total, so my guess is that the mechanic who serviced the car dumped the oil then forgot to refill it

I put 5 litres in today, took the car for a 20 minutes run and left if for an hour then checked the digital oil level, which was showing about 3/4 full, so I've put another 1/2 litre in and I will check again tomorrow.

There were no signs of leaks and, let's face it, if I'd lost 5+ litres of oil it would have been all over the place, so I'm pretty sure they just forgot to top it off.

Shame really, I've used them for years but that's the end of that...

[FreshAir]

Have you done a check with the technicians dipstick? It can be a pain to remove, wd-40 or other on the o rings can help. Got mine out with rope around the dip stick then a wooden handle on the rope, when it came it it was with some force....

Then you will know what level the oil is really at. 3/4 on digital gauge if accurate is a good level, good to leave some 'head room' on diesels with dpf. 5.7 litres is what is needed, not 6 as mentioned in some places.

If you need to remove some then you can such it out of the dipstick hole if needed.

The 'story' of the service sounds horrendous.