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      03-07-2019, 01:45 PM   #44
jrdoming
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Drives: 2017 340i M-Sport
Join Date: Dec 2012
Location: North Carolina

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2017 BMW 340i  [0.00]
Quote:
Originally Posted by rahlow View Post
What is the down pipe fix? I have a catless and I've heard as long as you aren't throwing CELs u have a decent to good chance of passing. Is that incorrect?
DPFix was something that was popular on the N54 (and I think N55?) that would stop the car from throwing the CEL and allow all the readiness tests to pass. If you are able to go enough miles without the CEL happening for all the tests to pass prior to inspection then you're good. If it happens and you have to reset codes then you have to have the tests pass again without a CEL before it will pass.
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