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Old 03-02-2006, 08:05 PM   #1
Scooby Specialist
Member#: 71682
Join Date: Oct 2004
Chapter/Region: SCIC
Location: Socal with BORICUA blood...
2007 WRX Sti LTD.

Default Will COBB AP fix the CEL with HELIX DP?

I'll be getting UP/DP (HELIX) and COBB AP. Does the COBB AP take care of the CEL or do I need the mec. fix???
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Old 03-02-2006, 08:19 PM   #2
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1998 RS


AP will take care of all DP and UP CEl's.
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Old 03-02-2006, 08:41 PM   #3
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04 WRB STi Stg II
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I just put on a Helix DP and went to Stage 2 with my AP.

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Old 03-02-2006, 11:51 PM   #4
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I'll be able to tell you on Monday.
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Old 03-03-2006, 12:07 AM   #5
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Location: Florida
2004 wrx sedan


I have the Helix DP w/ cat and before I got Cobb AP, I had a PO139 "rear o2 sensor circuit slow responce" cel code. After I got AP stage 2 put on, the previous code went away but I picked up a PO420 "catalyst system efficiency below threshold" code. While the weather was cold it stayed away, but when it gets warm (the weather), it comes on a few days after I clear it. I've been told by a few different people that a protune would fix it, that the higher flow is just outside the ecu's parameters.

Hope that helps.
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