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      02-27-2011, 02:07 PM   #4
Drives: 2013 BMW M3 ZCP Coupe
Join Date: May 2009
Location: Playa del Rey, CA

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Originally Posted by kpneverdies View Post
thanks for your reply. but, what if you got the tune specific for HFC and CEL still comes up?
You have to run the codes and see what shows up. If you are still getting cat inefficiency codes then something is a miss with the tune.

Most tunes raise the thresholds to keep a CEL from coming on, even if you are catless. The CEL can still illuminate if something else is causing it.

2013 M3 Coupe-MR/BLK ZCP, ACM test pipes, BPM Stg2 dev. tune and Megan catback, AFE Stg2. with C/F elbow
Previous rides: 2011 M3 Coupe-MR/Blk
2007 Porsche 997C2S Speed Yellow/Blk sport seats
2004 BMW M3 Imola/Blk
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