Hi there, my first post on here.

I’ve had my A6 since march and it been running brilliantly until last few weeks. I started getting the sudden jerks out of nowhere like the engine had stopped for a millisecond and then kicked back in. Happens 2-3 times then car runs fine. No eml, no other warnings. Have plugged my autel diagnostic and also OBDeleven and they have come back clean, so I’m at a loss. Happened tonight, driving at 30mph then put my foot down and it did it again and then fine. It’s done 56k miles and don’t know if it’s had gearbox service. No funny noises or other running issues so I’m stumped.

8 minutes ago, DAMO71 said:

Hi there, my first post on here.

I’ve had my A6 since march and it been running brilliantly until last few weeks. I started getting the sudden jerks out of nowhere like the engine had stopped for a millisecond and then kicked back in. Happens 2-3 times then car runs fine. No eml, no other warnings. Have plugged my autel diagnostic and also OBDeleven and they have come back clean, so I’m at a loss. Happened tonight, driving at 30mph then put my foot down and it did it again and then fine. It’s done 56k miles and don’t know if it’s had gearbox service. No funny noises or other running issues so I’m stumped.

Not big milage on it. If there's no printed service history could be worth a phonecall to an Audi dealer to check if it's has the gearbox service. It's most likely not the gearbox. The last guy who posted on this I contacted and his turned out to be the crank position sensor, same as my issue and I know two or three others who were also crank sensors. This is where I would be starting. The fault code for the crank sensor never showed up for a long time and a lot of jerking until I got a fourth computer plugged in. The sensor didn't cost much and took a local mechanic about 1.5hr to fit.

Thanks Paul, I’ll look into getting the crank position sensor sorted and see how I get on 👍

Is it crank position sensor or camshaft position sensor?

Crank position. It's hard to get at