Audi A4 B8 Intermittent starting problem

[Atherslad]

Sorry to hijack but my 2011 2.0 tfsi has an intermittent starting issue...

It has never not started, but every time it takes a different amount of 'churning' to actually fire up. Sometimes (usually when warm) it fires up instantly, others it takes 5 seconds, others its 3 etc. Worse when it is cold but not exclusively. Battery is not the issue as just had it replaced this week.

May not be related but its been a nightmare car - had it for just over a year, 3 breakdowns in the last 8 months. 2 where audi said they changed a coil pack and the third they replaced an injector. Only error codes coming up are intermittent aircon related ones. This problem outdates them

Anyone got any ideas what could be causing it?

Thanks!

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[sanduzmeu]

Car persists to not start first try even after new battery. Cranks faster but slow to start aswell. I may get back to Audi dealer again

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[Atherslad]

Car persists to not start first try even after new battery. Cranks faster but slow to start aswell. I may get back to Audi dealer again

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Same! New battery and probelm remains. If i wait 30 seconds with ignition on before starting then it usually doesn't happen.

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[sanduzmeu]

I got an obd reader and got this fault

Same! New battery and probelm remains. If i wait 30 seconds with ignition on before starting then it usually doesn't happen.

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I got an obd reader and got this fault. Manifold sensor position fault. And bank 1 O2 sensor 1, won't get any reading from it. Might be the cause


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[sanduzmeu]

I got an obd reader and got this fault I got an obd reader and got this fault. Manifold sensor position fault. And bank 1 O2 sensor 1, won't get any reading from it. Might be the cause


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Finally resolved the problem. Engine light came on, and the obd reader read a p2015 fault. To resolve the issue I took the actuator that connect to the manifold flaps out and disassembled it. Cleaned the sensor, and carefully installed it back. Cleared the engine light and hasnt come back since. Car starts fine now, and mpg has significantly increased. To check to see if the actuator motor is not working turn the car on and rev it. It should move even in neutral.


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[sanduzmeu]

Same! New battery and probelm remains. If i wait 30 seconds with ignition on before starting then it usually doesn't happen.

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[Atherslad]

Thanks for the update, not had that code come up but it might be worth looking to see - my mpg is awful at the best of times.

How difficult is it to do? What is involved?

Cheers

.

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[sanduzmeu]

Thanks for the update, not had that code come up but it might be worth looking to see - my mpg is awful at the best of times.

How difficult is it to do? What is involved?

Cheers

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The code only came up a few months after I had the problem. I am getting 55-56mpg cruising avg speed of 95km/h since I fixed the problem. Search p2015 Audi A4 on YouTube, and it's the first video explaining how to do it. Only one tool required, 30min job.

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[sanduzmeu]

Thanks for the update, not had that code come up but it might be worth looking to see - my mpg is awful at the best of times.

How difficult is it to do? What is involved?

Cheers

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Audi A4 B8 - P2015 Intake Manifold Flap Positon - Easy Fix - YouTube


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[Atherslad]

Audi A4 B8 - P2015 Intake Manifold Flap Positon - Easy Fix - YouTube


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I may well give that a go when i find myself with a spare afternoon

Thanks for the help! I hope ypu have no more issues. I read that if cleaning doesn't work there is a bracket you can buy to fix it fully for aroind £30.

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