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Welcome to North American Motoring ! |
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Welcome to North American Motoring,
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!
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07-29-2010, 05:55 AM
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Neutral
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Join Date: Jul 2010
Posts: 3
Gallery
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HELP - I'm New to Mini - P0172 code
Hello All,
I am new to Mini so please bear with me. I purchased an 06 S with several modifications (they are listed below). The check engine light is on and throwing P0172 code. The Long Term Fuel Trim on Bank 1 is at -20% at idle and drops to about -10% at 3,000 RPMs.
The car runs great but I can't get it to pass emissions.
The car did not have a cat on it when I got it. I replaced both O2 sensors and put on new CAT.
Someone recommended replacing both MAP sensors? Is this the next logical step? Any other suggestions?
Thanks,
Scott
The MODS are:
Madness Water-toAir Intercooler
Madness 15% pulley
Madness Intake
Madness Cowl Intake
CHR Head
Madness 380cc Injectors
Schrick Cam
NGK iridium plugs
Nology Wires
MTH Tuner
Madness Header
Milltek exhaust
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07-29-2010, 07:52 AM
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Vendor
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Join Date: Aug 2002
Location: Under your car
Posts: 898
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What cat did you put on the car, and how many miles ago?
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07-29-2010, 08:55 AM
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3rd Gear
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Join Date: Mar 2009
Location: Anchorage, Alaska
Posts: 180
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07-29-2010, 11:17 AM
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5th Gear
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Join Date: Apr 2009
Location: Newport News, VA
Posts: 766
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Just a note on the P0172 code link. '02-'06 MINIs do not have a mass airflow (MAF) sensor. They have two MAP sensors that work together to determine the proper air/fuel mixture. This is also known as speed density.
You have an aftermarket header and aftermarket exhaust. Look to see if you have an exhaust leak. This can cause false codes with the O2 sensors. Definitely check for vacuum leaks around the engine as well. Get a piece of hose and hold one end to your ear. Listen for a distinct hissing sound.
Another thought that comes to mind is you could possibly have a problem with your high-pressure fuel pump. Testing will require a mechanic's diagnostic.
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'06 MCS, AB/DS, #1/#2/#3, RMW Tuned, 15% Pulley, DDM CAI, NGK BKR7 plugs, Invidia exhaust, M7 Extreme Scoop, GReddy A-F/boost gauges, M7 F/Cobalt R strut bars, Kicker amp/sub.
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07-30-2010, 01:33 PM
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Neutral
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Join Date: Jul 2010
Posts: 3
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Thank you for the advice. I am on the hunt. Did find that the rear O2 wiring was touching the heat shield. Fix that now the light is out. Fingers are crossed. I'll report back. Thanks.
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07-31-2010, 05:54 AM
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2nd Gear
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Join Date: Feb 2009
Posts: 98
Gallery
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You'll have to check your intake for leaks using a smoke tester, most likely cause is the plastic charge pipe from the throttle to the supercharger.
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R55 Front brakes FS, calipers/rotors/pads
Wood Steptronic shiftknob FS PM for further details.
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08-04-2010, 06:26 AM
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5th Gear
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Join Date: Apr 2009
Location: Newport News, VA
Posts: 766
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Yes, a smoke tester works too. I forgot about that. I should see about buying one for future use myself.
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'06 MCS, AB/DS, #1/#2/#3, RMW Tuned, 15% Pulley, DDM CAI, NGK BKR7 plugs, Invidia exhaust, M7 Extreme Scoop, GReddy A-F/boost gauges, M7 F/Cobalt R strut bars, Kicker amp/sub.
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2006 MINI Cooper S
