High Flow Cats Throwing Codes
Thread Starter
Racer
Joined: Jun 2007
Posts: 266
Likes: 1
From: Mobile Al
High Flow Cats Throwing Codes
I installed High Flow Cats on my 04 LS1 Coupe and since the install they have been throwing low voltage codes on bank 1 and 2 and the rear O2 sensors. Any fix for this? Thanks....
Le Mans Master
Joined: Dec 2008
Posts: 5,414
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From: Texas
Last edited by tommie; Jun 5, 2009 at 01:22 PM.
Former Vendor
Joined: Jun 2009
Posts: 21
Likes: 0
From: DFW Texas
I would probably have them tuned out. I don't know if this trick works for LS1s, but on Dodge vehicles you take a couple of spark plug non-foulers (found in the help section at parts stores), drill the center out, screw them together in the exhaust pipe, then screw your rear O2 sensor in that. Fools the computer in Dodges, never had to do it in an LS1 as I just tune them out.
