Need help with my 2014 2.0 4 cylinder Allroad. The car has been giving intermittent starting problems after the car is warm from driving. The odd thing about the problem is that it doesn't happen every time consistently.

The engine starts (fires) immediately when the engine is cold and has been sitting, which is usually overnight. I can drive it for 15 minutes, park it, turn it off and come back to start it in 45-50 minutes and it cranks over but will not fire. Then I will stop cranking, try cranking again and give a couple presses to the gas pedal and it will start up with some hesitation or start roughly. Then the engine smooth right out. It runs down the road great. no loss of power. Recently, I drove the car on a relatively long road trip, about 5 hours. I started at sea level and ended at a higher elevation of about 8000'. Parked and turned off the car and about 20-40 minutes later went to start the car and it wouldn't start. It just kept cranking and cranking without firing. I pumped the gas pedal, a few times, like I had done before, but it wouldn't fire at all. I completely would not start this time. I let the car sit overnight. About 14 hours later I went to crank it up and the car fired immediately and started right up. There has been times when the check engine light would come on but the shop was unable to correlate to the problem. The first time they said something about the lean/richness but the car always started for them. The shop said to change a vacuum pump of some kind. Then they said lets try changing the crankshaft sensor. On seperate shop visits they did change the vacuum pump and then the crankshaft sensor but the engine still acts the same way. Check engine light has also come on and then the check engine light will go out on its own, this has happened a couple of times. The Audi service department wanted to change the high pressure fuel pump. I don't think that is the problem.

I hope you guys can shed some light on the problem.

Thanks

 

I'm having the same issue with a used 2013 Audi A4 Allroad I bought just about 1 month ago. Sometimes it will start just fine even when warm but other times it won't and I'll run into the issue after leaving the car overnight and starting it in the morning. Giving it gas while starting will get it to go every time.

I've begun to get an engine light and the code I'm getting most frequently is P2015. I was getting P2188 ( system too rich at idle, bank 1) but this seemed to kind of disappear after replacing all ignition coils and spark plugs.

When I look up P2015... - "Intake Manifold Runner Position Sensor/Switch Circuit Range/Performance Bank 1"

I'd be interested to know if you're running into the same codes. Maybe you could go to AutoZone or some other shop to get the codes and report back?

 

NVM, the issue definitely seems to come about when the engine is warm.

 

any solutions? My Audi service department said the high pressure fuel pumpe need to be changed. They said it was leaking gas into the engine causing the staring problem. that's a $2000 bill having them do it. Then then went on to say they will reassess the problem of the pump replacement!

 

I have not taken my car into the shop yet. I have 01 A4 that I'm driving mostly. It looks like the high pressure fuel pump can cause this issue based on a YouTube vid I saw. The pump though is only about $200-$300 dollars and the removal and installation isn't too difficult. Not sure why they would charge anywhere near $2000 unless they're charging a lot for the part.

Here's the vid for replacing the fuel pump in these cars:

 

I think I have solved the issue. Have not gotten a CEL. Please refer to https://www.audizine.com/forum/showt...1#post14252561 for details on exactly what I tried. I don't want to re-paste everything.

 

I've run a fuel system cleaner and noticed the starting issue was very much improved after that. It happens so infrequently now and even if the car is warm it pretty much starts every time. Any luck fixing this on your Allroad yet? I may end up replacing the high pressure fuel pump as I've discovered its very easy to remove, probably a 10-15 minute job in total.

 

So I've replaced the camshaft sensor and crankshaft sensor but the issue is the same. It looks like it might be the vapor purge solenoid. Im going to buy a replacement sometime soon and will try and update this page.

 

It looks like it was the PCV valve. Replaced it and didn't experience the issue after a few fill ups. Car also starts better. This appears to be a common failure. Part# 06H-103-495-AK . If the issue returns I'll update the post but I think its done at this point.

 

Unfortunately the startup issue came back a little while after replacing PCV Valve. But what is weird is it came back while it was cooler outside and now thats it has warmed up and after replacing all the E85 with 91 the car hasn't stalled since but it is hesitating just a bit on startup sometimes and I can't tell if it's normal or not. So I need to play the waiting game some more and see what happens.

I believe replacing the PCV valve resolved oil consumption issues. After replacing the oil I haven't noticed it going down at all and before it seemed to consume it fairly quick. It may have also helped with the initial starting issue in some way but I can't be sure.

One thing to note is I bought the car used and found out that the original car battery is still inside... So it's 8 years old at this point, straight from the factory. so I need to get this replaced asap just to eliminate any possibility of it being a dying battery. If it doesn't have issues for the next month or so then it likely was the PCV valve and those start up issues where ghosts??