Little Help!! Trouble code 16687 and 16684

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10-08-2011, 01:39 AM

Sublime 0018

1st Gear

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Join Date: Mar 2010

Posts: 3

Little Help!! Trouble code 16687 and 16684

Have a 2001 A4 1.8T with trouble code 16687 and 16684. I understand the code is misfire in the #3 cylinder. What is my first move? Change plugs?

10-08-2011, 04:42 PM

Dallas09

2nd Gear

Join Date: Apr 2007

Location: Minnesota

Posts: 1,161

First move is to swap coil packs id say and see if the code shifts, then swapping or replacing spark plugs.

10-09-2011, 10:42 AM

Sublime 0018

1st Gear

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Join Date: Mar 2010

Posts: 3

Thanks for the advise! I did replace all plugs so far, ran fine around the block. Now need to take out for a longer ride and see.

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