Check engine light

SUZEIRIS

MEMBER
2005 AUDI A8

Engine Mechanical problem V8 All Wheel Drive Automatic 69812 miles

I took my Audi A8 in for a console lid repair and they replaced the ignition coils as part of a recall campaign. My check engine light came on shortly after I got the car back. I took it back in and they replaced a crankcase pressure regulating valve and the air flow meter. I got the car back and the check engine light came on again immediately. I took the car back in and they replaced the evap valve. I got the car back and within 10 miles the check engine light came back on again. Would the original replacement of the ignition coils have triggered the check engine light? It was not on before I took it in and they did the coil recall work. The mechanic asserts that they are totally unrelated even though the car was running fine and the light was not on when I brought it in to fix the console lid.

1 Reply

SERVICE WRITER

MECHANIC
9,123 POSTS

It is entirely possible. The recall should not have made a difference unless a pcm reprogramming/update was done that could have changed the parameters of the emissions system.

Not knowing what codes were shown makes it more difficult to answer that. I can say that some self-tests do not run unless others have passed, evap is the last to run.

I find it odd that both the crankcase pressure regulating valve and the air flow meter were replaced.

Lets run the codes are selves to see whats going on, did they change the spark plugs when they did the coils because old plugs would cause this problem as well

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down this guide and report back

Cheers