Audi A5 This sleek mid-sized A5 coupe offers performance with a roomy interior.

Check engine light

Old 02-28-2019, 11:37 AM
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Join Date: Feb 2019
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Default Check engine light

Hello. I bought a 2011 a5 2 months ago. Passed emissions on the day I bought it. But 1000 miles in and my check engine light came on. I brought it to a local auto supply shop to have them scan the codes for me and this is what came up:

p2187 - system too lean at idle bank 1
p2279 - intake system too lean
p12a2 - fuel pressure sensor high

Iím assuming if these codes were an issue at the time of emissions testing - done on 12/21/18 - the car wouldnít have passed. Iím new to Audi so any direction on where to start will be greatly appreciated. Thanks!
Old 02-28-2019, 12:28 PM
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Old 02-28-2019, 05:48 PM
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Join Date: Feb 2019
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Thanks! In doing a little research, Iíve read a faulty pcv valve may be the bad guy here. I can hear a distinct whistling noise from there, and there is a vacuum on the oil cap. Iím thinking itís a decent place to start
Old 03-05-2019, 10:46 PM
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Join Date: Sep 2015
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Good idea. That's an easy fix. Make sure you get the latest version for your car.

There's one that ends in AK, but I think that's for Gen2 EA888 TFSI engines.

Last edited by findalex; 03-05-2019 at 10:49 PM.
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