My A4 starts rough

Asked by Nov 23, 2017 at 02:58 PM about the Audi A4

Question type: Maintenance & Repair

After getting error codes P2178 and P2188 and replacing the three  sensors,
my A4 ran well for a few hours. After I stopped it and tried starting it again after
about an hour, it felt like the engine was flooded and it sputtered and bogged. I
am afraid to try driving it. Help!!! What could the problem be?

2 Answers

299,085

One code you posted is lean condition, the other a rich condition, with that being said, that tells me, it's is not the O2 sensors. Those codes were indications the O2 sensor was detecting the problem. You could have a Vacuum leak, faulty crankcase breather valve, MAF, fuel issue, etc. Have an independent mechanic that works on German cars help diagnose it for you instead of throwing parts at the problem, it will give you piece of mind and get your car back on the road. Don't be afraid to drive it to the shop, as long as it gets there you will be fine.

1 people found this helpful.
12,665

when it comes to diagnosing a car its best to give as much information as possible such as what year is this car, what engine does it have, what trim level is it such as premium or such, is it a all wheel drive is it standard... you get the point at this point. and i would look at the spark plugs and check them for dirtyness and ware. if the plugs tips are burnt down and the piece of bent metal is rounded at a wierd spot like the corner your car is likely miss firing.

1 people found this helpful.

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