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Old 01-03-2012, 12:44 AM   #1
Scooby Specialist
Member#: 81659
Join Date: Feb 2005
Chapter/Region: NWIC
Location: Snoqualmie
2006 STI / 2010 FXT
Aspen White / Silver

Default Root Cause DTC P2227 Code

Has anyone been able to track down the root cause of a P2227 Barometric Pressure Circuit Range/Performance? The car has an AEM Map sensor, and AEM IAT sensor but other then that all oem sensors.
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Old 01-05-2012, 03:54 AM   #2
Scooby Guru
Member#: 140444
Join Date: Feb 2007
Chapter/Region: NWIC
Location: Near Seattle, WA
05 Stage Free LGT


Barometric pressure might mean ambient atmospheric pressure, rather than manifold pressure. Anyone know for sure?
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Old 10-16-2012, 11:02 AM   #3
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Member#: 25731
Join Date: Oct 2002
Chapter/Region: MWSOC
Location: Ft Wayne, IN
02 wrx(sold)/2005
Sti/ 93 Leg Wag


OP, did you have an issue related to this? Did you find out the cause?
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Old 12-23-2012, 07:04 PM   #4
Scooby Newbie
Member#: 288702
Join Date: Jul 2011

I have this same code P2227 Barometric Pressure Circuit Range/Performance. How can I go about fixing this. I have looked everywhere and had no right answer. Thank you
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Old 12-23-2012, 07:17 PM   #5
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Member#: 108089
Join Date: Feb 2006
Chapter/Region: MWSOC
Location: Minnesota
2003 WRX
NF Performance


what year
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Old 12-24-2012, 09:03 AM   #6
Scooby Newbie
Member#: 220799
Join Date: Aug 2009
Chapter/Region: International
Location: Taiwan
2006 Impreza WRX
WRC Blue


The newer cars have the BAP sensor integrated in the LH side Secondary Air valve. Upon starting the car it compared the values of the MAP sensor and the BAP sensor in that Secondary Air valve.

Did you get rid of these air valves? If not, use a LOGGER to check what values you are seeing from the BAP sensor as well as the MAP sensor and you might be able to answer your own question.

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Old 12-24-2012, 09:38 AM   #7
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Member#: 70395
Join Date: Sep 2004
Chapter/Region: MAIC
Location: Da-boonies,Va

The older vehicles (like the 2.0L's) had the unit integrated into the ECU. It is a separate sensor from the MAP sensor.
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Old 08-01-2015, 02:38 AM   #8
Scooby Newbie
Member#: 346180
Join Date: Feb 2013
Chapter/Region: NWIC
Location: Oak Harbor, WA
2006 STI Sedan


i'm having the same code on my 06 STI and I've reset and it just comes back... before I got her she was converted to FMIC.. where do I look for BAP sensor? pic would be excellent
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Old 04-24-2016, 04:09 PM   #9
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Member#: 410322
Join Date: Jan 2015

I also have a 2006 STI and i'm getting the p2227 code. I have reset it and it comes back the next time i start the car. It seems to run just fine but i hate the light flashing away. does anyone know how to fix it?
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