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Periphery Bit for P0420 Code

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Old Jun 25, 2009, 12:19 PM
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Periphery Bit for P0420 Code

Does anyone know the periphery bit to disable the P0420 (cat efficiency) code?

I did not see it in the periphery2 (FCA) table.

Last edited by chmodlf; Jun 25, 2009 at 02:30 PM.
Old Jun 26, 2009, 04:59 AM
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Bump for insight (mrfred???).

I did disable bits 4 & 5 in FCA (periphery 2).
Old Jun 27, 2009, 01:43 PM
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It should be same as P0421, so it is bit 1 of FCA
Old Apr 6, 2010, 04:31 PM
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how do you setup ecuflash to edit these periphery bits?

what changes do you make to the xml?
Old Apr 7, 2010, 06:01 AM
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Originally Posted by Dirty25RS
how do you setup ecuflash to edit these periphery bits?

what changes do you make to the xml?
http://evoecu.logic.net/wiki/Patching

https://www.evolutionm.net/forums/ec...-underway.html
Old Apr 7, 2010, 02:41 PM
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^Thank You

I had already seen the 2nd link but the first one helped, the information I actually needed was in the "periphery configuration" portion of the 1st link.

I'll get right on this.
Old Apr 7, 2010, 06:30 PM
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Ok, did the FCA bit change from 1 to 0
did the OBD availability & pass changes

drove 40 miles, mixed highway and street, a few hard pulls
no CELs so far.
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